Founder
May 6, 2026
25 min read
What happens the moment the internet goes down? During an earthquake, in a remote rural area, or at an overcrowded music festival, payment infrastructure collapses. Traditional financial architecture has never truly solved this problem, cash offered a physical workaround, but one that lacked the scalability and security of the digital world.
Offline blockchain payments represent the joint answer of engineering and law to this long-standing challenge: they enable digital value transfer without an internet connection, through cryptographic signatures, hardware security elements, and smart contracts. Yet the possibilities the technology offers are matched in complexity by the legal uncertainties it introduces.
At Genesis Hukuk, we bring together the technical architecture and legal implications of offline payment systems into a comprehensive guide for FinTech entrepreneurs, CASPs, and regulatory compliance teams, at this critical juncture when Law No. 7518 has granted crypto assets a new legal status, the Digital Turkish Lira has entered its second phase, and central banks worldwide are accelerating their CBDC pilot programs.
Offline blockchain payments are technically built on a layered architecture. Each layer of this architecture carries its own distinct legal risk and area of liability.
A blockchain network is, by its very nature, grounded in a globally synchronized ledger. Every transaction passes through a consensus process requiring the approval of thousands of validator nodes. Offline payments defer this consensus process: the value transfer takes place, but network confirmation is obtained later.
This deferred-consensus model manifests in three core operational structures:
Fully Offline: Neither the payer nor the payee requires a network connection. Value is transferred directly between devices. This model most closely mimics physical cash, and carries the highest risk of double-spending.
Intermittently Offline: Transactions occur offline and can be spent immediately; however, once a specified number of transactions, amount threshold, or time period is reached, the system demands mandatory synchronization. This architecture, favored in the European Central Bank's Digital Euro design, offers a more balanced framework from the standpoint of risk management and regulatory compliance.
Progressively Offline: Value is cryptographically locked between devices, but the recipient cannot spend the funds without first connecting to the network. This model delivers the highest security at the cost of the lowest user experience.
The choice between these three models is not a purely technical decision. Each model corresponds to a different compliance burden, a different liability matrix, and a different regulatory framework.
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The most established technical solution for offline blockchain payments is the payment channel — or state channel. Think of this structure as a private, temporary payment tunnel established between two parties.
The core operating logic is as follows: Two parties lock a specified amount of digital assets into a smart contract on-chain. They then make payments to each other from this locked pool without needing to connect to the network. Each payment is stored in cryptographically signed blocks, chained together by sequential block numbers. When the channel closes, only the final balances are written to the blockchain.
The ZenPay protocol provides a concrete real-world implementation of this architecture. Built on the Solana blockchain, this open-source payment channel protocol has Alice lock 50 USDC into an escrow PDA before going offline. At Bob's shop, both devices transact with no internet connection.
Alice's phone converts this signature into a QR code; Bob's device scans it and records the payment as "pending." The entire transaction completes in under one second. When Bob later connects to the internet, the on-chain program verifies the Ed25519 signature and transfers 12 USDC to Bob's account.
The legally critical feature of this structure is that each payment block is chained to the previous one via a prevHash link. This cryptographic chain forms the technical foundation of the "legal finality" discussion we examine in the pages ahead: if Alice attempts to spend the same funds twice, the chain breaks and the on-chain program detects it.
In the Bitcoin ecosystem, Lightning Network and on Ethereum, state channel networks, implement more sophisticated versions of this model, achieving throughputs exceeding 33,000 transactions per second. The Teechain protocol, combining this architecture with Trusted Execution Environments (TEEs), recorded latencies of just 0.1 seconds in transatlantic deployments.
Legal Note: Payment channels may be classified as payment services under Turkey's Law No. 6493. In structures where the channel operator temporarily controls funds, it must be separately analyzed whether an e-money institution license from the BRSA (BDDK) is required.
Cryptographic solutions at the software layer represent only one dimension of offline security. Where the transaction meets the physical world, hardware security takes over.
The Secure Element (SE) is a hardware chip that houses cryptographic keys, runs payment applications, and is certified as resistant to physical tampering. Tokenization in EMV standards largely operates through this structure. It is the foundation of the security architecture behind Apple Pay and Google Pay.
The Trusted Execution Environment (TEE) is a secure, isolated region within the device's main processor that operates independently of the operating system. As demonstrated by Intel SGX, code and data running inside a TEE remain protected even if the operating system is compromised. In an offline payment scenario, the TEE performs the following function: the user's device deposits collateral on-chain; the TEE cryptographically binds this collateral to the offline payment channel; once the counterparty verifies the existence of this collateral, the offline transaction begins. When the channel closes, the TEE submits the final transaction to the main ledger.
Physically Unclonable Functions (PUF) exploit microscopic variations in semiconductor manufacturing to generate a unique "digital fingerprint" for each device. This technology prevents a hardware wallet from being cloned and used to generate fraudulent transactions.
The AirSign protocol employs a zero-network air-gap signing paradigm. The private key never touches an internet-connected device; the signing device and the online machine communicate solely through a one-way optical QR code channel. Every frame transmitted through the channel is protected with ChaCha20-Poly1305 AEAD: a single bit change causes MAC verification to fail and the frame to be dropped. No executable code is ever transmitted through the channel, this architecture renders man-in-the-middle attacks effectively impossible at the optical layer.
NFC and QR codes are the interfaces where offline payments touch the end user. Near Field Communication (NFC) uses a dynamic UID that changes with each transaction, preserving privacy while resisting cloning attacks. Across a wide range of applications, from transit turnstile systems to retail POS terminals, NFC's 500-millisecond transaction speed is of critical importance.
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The Achilles' heel of offline digital payments is double-spending. Given how trivially easy it is to copy digital data, the following scenario appears plausible: Alice pays 50 USDC to Bob; simultaneously, she pays the same 50 USDC to Carol. Both see "payment received," yet neither knows the true balance until synchronization with the online system occurs.
Solving this problem requires not just cryptographic software, but the combined force of hardware and cryptography.
Academic literature and central bank research demonstrate that offline systems capable of preventing double-spending must operate within a MISM framework. In this framework, the device runs a state machine that advances in only one direction, monotonically, within an isolated hardware environment.
We can observe this principle concretely in the ZenPay protocol: each payment block contains the hash of the previous block. This cryptographic chaining makes rolling back a sequence number impossible. The on-chain program verifies that the incoming payment's seq (sequence number) value is greater than the current last_seq. Any payment request arriving with a smaller or equal sequence number is rejected outright.
At the hardware layer, the SE or TEE stores this monotonic counter in an encrypted, tamper-resistant memory space. An attacker who attempts to copy the device's operational state byte-by-byte will copy the counter as well, but payments made from either copy will mutually invalidate each other.
Cryptographic encryption protects the confidentiality and integrity of data, but it cannot perform a "balance check" in an offline environment. The encryption system can say: "This signature belongs to Alice." What it cannot say is: "Alice has not already spent this money."
Without a real-time network connection, the only way to answer this question is for the device itself to maintain this history. But when the device is compromised or cloned, that history is cloned with it.
For this reason, the BIS Project Polaris guide and global central bank research specify that hardware protections such as SE/TEE are a mandatory element in the architecture of offline CBDC systems. Zero-Knowledge Proofs (ZKPs) offer a powerful alternative, verifying transaction validity while preserving privacy, yet on resource-constrained hardware, the computational load can cause significant latency.
The deep divide between blockchain's "probabilistic finality" and commercial law's concept of "definitive and irrevocable transfer" constitutes the most fundamental legal problem of offline payments.
In traditional payment systems, finality is deterministic. A central authority updates a unified ledger and marks the transaction as final. All participants share this single truth.
Decentralized blockchains, by contrast, are built on probabilistic finality. In a Proof-of-Work (PoW) consensus model, the probability of a transaction being reversed decreases with each new block added, but mathematically, it never reaches zero. Chain reorganizations, forking, or 51% attacks are, in theory, always possible.
Offline blockchain payments deepen this uncertainty further. When two devices transact offline, their local ledgers record the transaction as "finalized." Yet the global network is unaware of this state change. This temporal window creates a legally critical risk: local finality may conflict with global state.
In commercial law, "settlement finality" refers to the moment at which ownership passes from one party to another in a manner that cannot be reversed by any legal mechanism, including insolvency proceedings. This determinism directly conflicts with blockchain's probabilistic structure.
The European Union's Settlement Finality Directive (SFD, 98/26/EC) resolved this problem for centralized payment systems: transfer orders entered into designated payment and securities settlement systems are protected from the systemic effects of insolvency proceedings. However, applying this directive to decentralized, peer-to-peer, offline transactions requires substantial legislative adaptation. When an offline blockchain transaction occurs outside a centralized intermediary, regulators have historically been reluctant to extend this finality protection.
The European Commission's draft Digital Euro regulation (2023/0212/COD) attempts to resolve this question with an explicit statutory definition: final settlement occurs the moment the digital asset record on the local secure storage device is updated, and this finality is recorded as independent of whether the network has synchronized. Turkey's Digital Turkish Lira project clearly requires a similar legal framework.
To whom does the "ownership" of a digital asset transferred in an offline environment belong? Answering this question requires examining both the U.S. UCC reform and the international UNIDROIT Principles.
Article 12, added to the U.S. Uniform Commercial Code (UCC) through the 2022 reform, introduced the concept of the "Controllable Electronic Record" (CER) into our legal universe, a category specific to crypto assets. Many commercial centers, including New York, have adopted this provision, with some jurisdictions implementing it from 2026 onward.
Under UCC Article 12, "control" requires three elements:
First, the person must have the power to obtain "substantially all the benefit" of the CER. Second, they must have the exclusive power to prevent others from obtaining that benefit. Third, they must have the exclusive power to transfer control of the CER.
This legal definition maps precisely onto the cryptographic reality of private key ownership. When a user holds a digital asset in an offline TEE, they are exercising exclusive control within the meaning of UCC Article 12, and this control establishes the property right.
The most important innovation introduced by Article 12 is the concept of negotiability. When control of a CER is transferred, for example, when two offline hardware wallets touch, a "take-free" rule attaches alongside the transferred rights. This rule allows the offline recipient to take the asset free of third-party ownership claims, functioning in electronic form much like a negotiable instrument (analogous to a bearer instrument).
In the Turkish law context, while this concept has not yet found its way directly into legislation, Law No. 7518's characterization of crypto assets as "intangible assets" suggests that a similar control-ownership relationship could be constructed within the framework of the Turkish Civil Code.
The UNIDROIT Principles on Digital Assets and Private Law, adopted in 2023, establish a technology-neutral framework among 65 member states including the G20. Articles 8–10 introduce a "shelter" rule parallel to the UCC's "take-free" rule: a bona fide transferee acquires the digital asset free of third-party ownership claims. Articles 14–17 grant absolute priority to creditors who perfect a security interest through control. International CASPs can leverage this framework particularly in insolvency scenarios to determine ownership priority.
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Offline transactions disable the real-time network safety net. This choice reshapes a liability matrix stretching from software developers and hardware manufacturers to merchant acquirers and issuing banks.
When an offline transaction fails or a double-spend occurs, determining who bears the loss is both technically and legally complex. The current legal framework addresses this problem through two primary theories of liability.
Strict liability theory (Greenman v. Yuba Power Products, §402A) imposes liability on a manufacturer when a defective product causes harm, regardless of the degree of care exercised. Applied to offline blockchain systems, the implications are severe: a TEE developer could be held liable for every double-spend resulting from a zero-day vulnerability, irrespective of how aggressively the vulnerability was audited. Courts have therefore been reluctant to apply strict liability to software, wary of the chilling effect on innovation.
Fault-based liability is the more common path. The injured party must prove that the hardware vendor or software developer failed to meet industry standards, for example, by failing to patch a known vulnerability. In enterprise software scenarios, courts frequently apply the "economic loss doctrine," limiting a claimant to contractual remedies rather than tort recovery.
Current academic and regulatory discourse draws liability boundaries along three dimensions of control. First, parties that determine state channel closing rules or provide transaction-matching infrastructure may fall under regulatory oversight due to their clearing and settlement function. Second, the traditional "custody" threshold, direct control over digital assets, triggers compliance reporting obligations for any party that crosses it. Third, and most critically: developers and DAOs with the power to alter smart contract parameters, freeze funds, or upgrade a protocol, including governance token holders who participate in protocol voting, may, without realizing it, fall within the scope of the U.S. Bank Secrecy Act or Turkey's payment regulations.
For merchants accepting offline transactions, there are two primary methods — and the difference in risk between them is striking.
Offline EMV: The terminal communicates with the chip embedded in the card to cryptographically verify PIN correctness and transaction limits without a live connection. Control resides in the card. If the transaction is approved, it is processed during settlement. The security level is comparatively high; however, some U.S. banks have moved away from this architecture due to the synchronization complexities of offline PIN management.
Store and Forward (SAF): The POS device stores card data in encrypted form in temporary memory and immediately approves the transaction without any chip verification or balance check. Once the device reconnects to the network, the transactions are submitted in a batch.
The critical risk of SAF is this: declined transactions are the merchant's responsibility. When a transaction is declined, the loss falls entirely on the merchant. Moreover, if the POS device is damaged after entering offline mode, all stored transactions are permanently lost.
The choice between these two models is not a simple technical preference, it is a critical risk management decision that can determine whether a business survives or goes under.
The EMV Liability Shift rules, which took effect globally in October 2015, introduced a landmark rule that places responsibility for fraud on whichever party has not upgraded to chip infrastructure.
The core rule is as follows: if a chip-enabled card is used at a legacy POS device capable of reading magnetic stripes but not chips, any resulting fraud loss shifts from the card's issuing bank to the merchant/acquiring bank.
Critical reason codes to be aware of include Visa 10.1 (cloned card swiped via magnetic stripe), Visa 11.2–11.3 (transactions declined upon reconnection in SAF mode), and Mastercard 4808 (failure to obtain required authorization). It must be particularly emphasized that merchants processing transactions in SAF mode generally have no right to dispute chargebacks falling under Visa 11.2–11.3.
While American Express and Mastercard enforce this rule strictly, Visa applies a different liability allocation for lost/stolen card scenarios in the U.S. market.
The deepest tension in offline payment design is not technological, it is ideological: the conflict between cash-like anonymity and mandatory financial surveillance has yet to be resolved at a global level.
Physical cash is untraceable and anonymous. As offline digital money attempts to replicate this property, it encounters the limitless monitoring demands of AML/CFT regimes on the other side of the equation. A peer-to-peer, offline, intermediary-free transaction environment makes the application of traditional financial crime compliance frameworks technically extremely difficult: real-time monitoring cannot be conducted, sanctioned individuals cannot be blocked instantaneously, and identity verification cannot be performed.
The FATF Travel Rule requires financial institutions and VASPs to share detailed sender and recipient information for fund transfers above a specified threshold. In Turkey, MASAK has transposed these international standards into domestic law, with new 2025 circulars imposing remote identity verification and Enhanced Due Diligence obligations on crypto service providers.
Meeting these obligations in an offline environment is a problem that must be addressed at the design stage of any system.
The "compliance by design" approach treats AML/CFT obligations not as a patch added after the fact, but as an architectural element embedded in the system's DNA.
Practical applications of this paradigm include:
Tiered limit architecture: Low-balance wallets without KYC requirements are permitted limited offline transactions, while high-balance wallets require full identity verification. Ghana's eCEDI pilot program successfully applied this risk-based approach, enhancing financial inclusion through zero-KYC accounts in rural areas.
Hardware-based transaction caps: Wallets that reach a specified amount, duration, or transaction count cannot initiate new transactions until re-synchronization is performed. Implementing this restriction at the hardware element level (SE/TEE) rather than the software layer critically increases resistance to manipulation.
Accelerated synchronization obligations: The requirement that offline transaction history synchronize with servers within milliseconds upon reconnection, creating an immutable record, is aligned with the technical standards applicable to e-money institutions under Turkey's Law No. 6493.
Post-fraud traceability: While users enjoy cash-like privacy during the offline transaction period, the underlying transaction history is cryptographically committed to the hardware device. When the device synchronizes, graph analysis algorithms can conduct retroactive audits. Law enforcement armed with judicial authority can access decryption keys or trace asset flows through appropriate court orders.
The extensive data collection required for compliance monitoring directly conflicts with data protection legislation. This tension is most pronounced in two areas.
Joint data controller risk: Node operators or intermediary platforms that store transaction data for compliance monitoring purposes may be classified as joint data controllers under the GDPR. This brings with it obligations of data minimization, the right to erasure, and purpose limitation.
Systemic risk of data breaches: In the traditional two-tier banking model, a data breach is confined to a single institution's user base. In a distributed ledger, however, a data breach at a single intermediary node can expose the data of the entire system.
Among the available solutions, the most promising approach is ZKP-based compliance reporting. In this paradigm, the system generates cryptographic proofs demonstrating that a transaction complies with specified rules, for example, that the amount is below a threshold, without disclosing identity information. It is possible to prove that compliance has been achieved, while the substance of the transaction remains private.
In Turkey, the balance between KVKK and AML obligations must be separately evaluated under the exceptions provided by Law No. 6493 and Article 28 of the KVKK when designing an offline CBDC architecture.
Turkey is experiencing one of the world's most intriguing regulatory paradoxes: while prohibiting payments with private crypto assets, it is simultaneously and rapidly developing a state-backed CBDC with advanced offline capabilities. This dual-track strategy is, in fact, a highly calculated expression of monetary sovereignty.
Law No. 7518, which entered into force in July 2024, represents a sweeping transformation of Turkey's capital markets legislation. The Law granted crypto assets an official status in Turkish law for the first time, defining them as "intangible assets" within the scope of civil law.
The key provisions introduced by the Law are as follows:
Licensing requirement: Crypto Asset Service Providers (CASPs) are required to obtain an operational license from the Capital Markets Board (CMB/SPK). This regulation has functionally aligned Turkish law with the EU's MiCA framework, though with a stricter and more centralized licensing mechanism.
Custody standards: Licensed custody platforms are obligated to safeguard client assets in accordance with specified security standards.
Capital adequacy: CASPs must demonstrate financial soundness.
Entities that develop offline payment solutions without obtaining a license under Law No. 7518 may face serious administrative and criminal risks. It is therefore critically important for FinTech ventures to assess their regulatory compliance position with the guidance of legal counsel.
The Central Bank of the Republic of Turkey (CBRT) explicitly prohibited the use of crypto assets as payment instruments in a regulation published in April 2021. This prohibition is grounded in a robust legal framework consisting of Law No. 6493 on Payment and Securities Settlement Systems, Payment Services and Electronic Money Institutions, and Decree No. 32 on the Protection of the Value of Turkish Currency.
This prohibition draws a clear legal boundary for Turkish entrepreneurs developing offline blockchain payment solutions: the use of private crypto assets (USDT, USDC, BTC, ETH, etc.) as payment for goods or services conflicts with the current legal framework, regardless of whether the payment takes place offline or online.
It is accepted that even holding an e-money institution license under Law No. 6493 would not bring a private crypto payment instrument within the scope of that license. Given that e-money under Law No. 6493 is defined as a payment instrument issued in exchange for fiat currency and redeemable for the same, decentralized crypto assets fall outside this definition.
For entrepreneurs developing offline payment systems, the critical question is this: Does the system operate exclusively with the Digital Turkish Lira or legal tender, or does it also encompass private crypto assets? This distinction directly determines legal positioning under Turkish law.
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The Digital Turkish Lira project, led by the CBRT, is among the most comprehensive state-backed initiatives in the global CBDC race. Following proof-of-concept work in Phase 1, the project has advanced to its second phase, with the focus shifting to simulating macroeconomic effects and testing offline transaction capacity.
The most fundamental feature distinguishing the Digital Turkish Lira from conventional e-money wallets is its offline payment capability. This capacity enables:
Continuation of payment flows even if telecommunications infrastructure collapses in natural disaster scenarios.
Financial inclusion in rural areas and regions with poor internet access.
Instant settlement of high-volume retail transactions without latency.
The CBRT is also working on the legal dimensions of the project, preparing legislative drafts addressing the Digital Turkish Lira's status as official legal tender, user data privacy, and the responsibilities of commercial banks within the system.
The second phase of the Digital Turkish Lira encompasses distributed ledger technologies, permissioned network architectures, and centralized-hybrid models as its technical infrastructure. The most transformative innovation of this infrastructure is the smart contract layer.
The primary use cases that could be unlocked by a programmable Digital Turkish Lira include: smart contracts that conditionally trigger corporate payments; targeted public expenditure that restricts social assistance to specific spending categories (food, medicine, education); and time-based triggers driven by oracle data — for example, agricultural insurance payouts tied to weather conditions.
This programmability brings commercial law's "if-this-then-that" logic directly into digital currency. However, the legal status of smart contracts has not yet been codified in Turkey — a gap that leaves the legal framework for programmable CBDC scenarios uncertain.
The Digital Turkish Lira's offline payment capability is not merely a technical choice — it is a strategy of sovereignty and resilience. The infrastructure vulnerabilities exposed by disasters such as the 2023 Kahramanmaraş earthquake make it imperative that payment systems be capable of functioning independently of connectivity. The CBRT has announced that the Digital Turkish Lira will operate in parallel with the centralized FAST system, creating a critical redundancy layer in disaster recovery. The principle that the project will not require a traditional bank account also opens an important gateway to the digital economy for populations excluded from the banking system.
For organizations developing or providing offline blockchain payment systems, the following checklist summarizes the key headings of the legal and technical compliance framework.
Licensing and Legal Status: Analyze whether the service you provide requires a CASP license under Law No. 7518. Separately evaluate the position of systems that operate exclusively with the Digital Turkish Lira within the CBRT/BRSA authorization framework. If you are providing an offline e-money service, identify your obligations under Law No. 6493.
Technical Security Architecture: Use SE, TEE, or PUF-based hardware security elements for double-spend protection. Encode transaction limits at the hardware level. Implement monotonically increasing sequence numbers and hash chaining (ZenPay's prevHash approach). Mandate AEAD encryption (ChaCha20-Poly1305 or equivalent) on QR/NFC channels.
AML/CFT Compliance: Build a tiered KYC architecture — simplified registration for low-value transactions, full verification for high-value ones. Guarantee that offline transaction history synchronizes with an immutable record upon reconnection. Integrate MASAK suspicious transaction reporting infrastructure and FATF Travel Rule information-sharing obligations into the architecture by design.
Data Protection (KVKK/GDPR): Limit KYC and transaction data collection to what is strictly necessary under the data minimization principle. Execute data processing agreements with third-party node operators. Document data breach notification protocols.
Liability Management: Include security vulnerability indemnification and product liability clauses in hardware/software manufacturer contracts. Explicitly define the risks posed by SAF mode in merchant agreements. Establish technical log infrastructure for chargeback proceedings.
Explore how Zero-Knowledge Proofs and on-chain identity systems navigate KVKK, SPK, and MASAK compliance in Turkey. Learn about privacy-by-design solutions.
Below we share a series of legislative improvement proposals addressed to both Turkish regulators and industry stakeholders.
Clarity of statutory definition: Defining the concept of "offline digital payment instrument" in Law No. 6493 or secondary legislation would eliminate licensing ambiguity and strengthen investor confidence.
Regulatory Sandbox: A FinTech sandbox program under the BRSA and CMB could provide a controlled testing environment for offline payment prototypes. The UK FCA Sandbox's tests across more than 200 firms and the Singapore MAS grant-supported sandbox model offer successful precedents that Turkey could adapt.
Tiered safe harbor: Simplified compliance obligations could be applied to offline transactions below a specified per-person monthly limit. This approach would enhance financial inclusion while allowing regulatory resources to be focused on high-risk transactions.
Legal finality legislation: The Digital Turkish Lira legal framework should explicitly define the moment of finality. The model from the Digital Euro draft — recording that finality is achieved the moment the local device record is updated — provides a template ready for adaptation into Turkish law.
Smart contract legislation: Alongside the programmable Digital TL, a dedicated legal framework governing the legal status of smart contracts, their enforcement mechanisms, and the liabilities of the parties involved will be required. Proactively closing this legislative gap is of critical importance for Turkey's vision of becoming a digital finance hub.
No. The CBRT's April 2021 regulation explicitly prohibits the use of crypto assets as payment instruments. This prohibition applies regardless of whether the payment is made offline or online. For legal offline payment solutions, the Digital Turkish Lira infrastructure or e-money systems licensed under Law No. 6493 should be considered.
CASPs that intermediate crypto asset transactions under Law No. 7518 are required to obtain a license from the CMB (SPK). Offline systems that incorporate a payment service element may also be subject to the regulatory supervision of the BRSA (BDDK) under Law No. 6493. Where the jurisdictions of the two regulators overlap, which authority is competent depends on an analysis of the specific business model.
The answer varies depending on the technology used and the contractual framework. In EMV-based systems, the loss from transactions declined in SAF mode generally falls on the merchant. In blockchain payment channels, the smart contract architecture and protocol design are the primary factors determining the distribution of liability. For losses arising from hardware security vulnerabilities, manufacturer liability — whether strict or fault-based — remains a contested issue.
This is the central legal question of offline blockchain payments. Without a legal framework that treats the technical transaction (the local device update) as legal settlement, it remains unclear precisely when commercial law's standard of "irrevocable transfer" has been satisfied. The Digital Euro legislation resolved this ambiguity by legally registering finality at the moment of the local device update. For the Digital Turkish Lira in Turkey, the creation of a similar statutory finality definition is indispensable to the project's commercial adoption.
No — on the contrary, when properly designed, ZKP can facilitate AML compliance. Zero-Knowledge Proofs make it possible to prove that a transaction complies with specified rules — that the amount is below a limit, that the user is on an approved list, or that the funds come from a clean source — without disclosing identity information. However, legislative adaptation is required for this technology to gain regulatory acceptance and for supervisory authorities to begin recognizing ZKP-based compliance reports as valid.
Offline blockchain payments are not merely a technical engineering achievement — they represent a paradigm shift that fundamentally challenges centuries of commercial law doctrine.
To build the legal framework for your blockchain payment architecture, manage your regulatory compliance processes, or map out your licensing journey in Turkey, contact us.
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Important Notice: This article is for informational purposes only and does not constitute legal advice. Institutions and ventures developing offline payment systems, applying for licenses, or seeking to manage compliance processes should obtain expert legal counsel tailored to their specific circumstances.
