UK Finance has indicated that effective sanctions enforcement, identifying the real owners or controllers of assets has always presented significant difficulties. This challenge intensifies significantly with cryptocurrencies, where the technology’s much-heralded openness does not always translate into clear links between transactions and real-world individuals or organizations.
While blockchain ledgers allow observers to follow the flow of digital assets, they frequently fall short in providing reliable attribution.
Wallet addresses may not connect definitively to off-chain identities, making robust intelligence gathering essential.
A pivotal development in this area has been the implementation of the Travel Rule in September 2023, which compels relevant firms to gather and confirm key details about those sending and receiving crypto funds.
lf-custodial (or non-custodial) wallets have amplified the potential for sanctions circumvention.
UK Finance also noted that these tools enable users to maintain direct control over their private keys, bypassing traditional financial intermediaries.
Sanctioned entities can exploit them to store value and then route assets through unregulated or lightly supervised platforms for swapping, pooling, or converting to fiat currency, often with minimal customer due diligence.
This setup creates substantial hurdles for establishing ownership and control.
The growing popularity of crypto heightens these operational concerns. Projections indicated 750 to 900 million global cryptocurrency users by the close of 2025.
Surveys from that period showed that 59% of wallet holders favored non-custodial options, with the self-custody market on track to approach $10 billion in value by 2028.
At the same time, illicit use surged: the value of crypto received by sanctioned parties jumped 694% to $104 billion in 2025.
Financial institutions now confront a critical decision when encountering transactions involving self-custodial wallets.
Should they accept payments that have touched these addresses, potentially exposing themselves to sanctions violations? Or should they decline them outright, which could inadvertently disrupt legitimate business?
This dilemma stems from the core “attribution gap”—the disconnect between visible transaction trails on the blockchain and verifiable real-world ownership.
The United Kingdom has responded by extending oversight to crypto exchanges, stablecoin systems, and related infrastructure.
UK Finance further explained in a blog post that this creates both immediate risks (from direct blockchain interactions) and secondary exposures (through connected activities) for traditional financial players.
UK rules treat crypto risks similarly to those of conventional assets, without clear distinctions.
The Office for Financial Sanctions Implementation (OFSI) advises institutions to examine transaction histories for at least three to five hops—or until reaching a clearly identified service provider.
Conventional sanctions screening relies on known account holders and identity verification.
UK Finance also pointed out that crypto shifts this paradigm, requiring a more investigative approach that merges blockchain data with external intelligence sources.
While the Travel Rule applies to UK-registered crypto businesses, it does not universally cover all jurisdictions or purely self-custodial arrangements.
Firms must often evaluate incomplete data and exercise judgment based on their internal risk tolerance.
Where information is absent—particularly from regions without equivalent rules—reasonable measures aligned with a firm’s risk appetite are generally permitted.
Blockchain visibility is frequently overstated as a compliance solution. True effectiveness hinges not just on tracing movements but on proper attribution techniques, enhanced information sharing across borders, and better regulatory harmonization.
Even attributed wallets raise questions about ultimate beneficial ownership and control.
As cryptocurrency use expands across global jurisictions, sanctions regimes must evolve to address this attribution shortfall.
According to insights from UK Finance, success will now depend on advancing analytical tools, fostering collaboration, and enabling firms to balance innovation with prudent risk management. UK Finance has concluded that institutions that strengthen their capabilities in this particular domain will most likely be better positioned to support compliant digital asset flows while safeguarding against potential sanctions evasion.