Britain is expanding its crackdown on Russia-linked crypto transactions, urging banks and crypto firms to trace complex payment routes and proposing fines up to 100% of breach value for sanctions violations
The United Kingdom is intensifying its approach to enforcing Russia-related sanctions by shifting focus from blacklisted entities to the underlying payment infrastructure that enables sanctioned actors to move funds. On August 31, the National Crime Agency (NCA) issued its first nationwide industry alert targeting the A7 network, instructing banks, payment processors, and crypto firms to scrutinize not just direct counterparties but also intermediary wallets and cross-border payment channels associated with Russia-linked transactions.
Expanded Scrutiny on Crypto Infrastructure
This new alert signals a broader enforcement strategy. Rather than relying solely on name-based screening, UK authorities are urging compliance teams to investigate transaction patterns that may indicate sanctions evasion. The NCA highlighted red flags such as the use of intermediary wallets, transaction hashes linked to decentralized exchanges, mixers, over-the-counter and peer-to-peer routes, services lacking know-your-customer (KYC) controls, chain-hopping, VPN usage, and frequent changes in payment infrastructure. These tactics reflect how sanctioned networks have adapted to regulatory pressure, making detection more challenging for both traditional financial institutions and crypto service providers.
Proposed Increase in Sanctions Penalties
Alongside the alert, the UK government has proposed doubling the maximum civil penalty for sanctions breaches involving measurable funds or economic resources. If enacted, the Office of Financial Sanctions Implementation (OFSI) could impose fines up to the greater of £2 million or 100% of the breach value-an increase from the current ceiling of £1 million or 50%. The proposal, which still requires legislation, would give OFSI discretion to levy penalties below the maximum but signals a clear intent to raise the cost of non-compliance for firms handling Russia-linked transactions.
Complex Payment Networks and Persistent Risks
The A7 network, which operates a cross-border settlement system, has reportedly processed over $86 billion in its first year, according to self-reported figures. UK authorities allege that A7 has used financial institutions in third countries, SWIFT, and other international payment rails to help Russian clients circumvent sanctions. The evolution of these networks is illustrated by the movement of crypto liquidity from Garantex to Kyrgyzstan-registered Grinex via A7A5, a ruble-backed token, after Garantex faced enforcement action. By May 2025, Grinex had recorded more than $1.2 billion each in incoming and outgoing USDT transaction volume. The U.S. Treasury has stated that Garantex employees were involved in building Grinex's infrastructure, and that users regained access to funds or received equivalent value through A7A5.
For UK-regulated firms, the implication is that sanctions exposure may persist even after a crypto exchange, wallet, or payment service changes its name, jurisdiction, or technical rails. The new enforcement approach requires firms to follow the flow of funds, not just check if a counterparty appears on a sanctions list. This mirrors the regulatory uncertainty seen in other jurisdictions, such as the U.S., where the fate of major crypto legislation remains unclear as key policymakers depart-an issue explored in EgonCoin's coverage of the CLARITY crypto bill's uncertain prospects.
According to the NCA, last year's Operation Destabilize disrupted a major Russian-speaking professional money laundering network, but the agency warns that evolving payment routes continue to pose a threat. The August 31 alert marks a shift toward more proactive monitoring of crypto infrastructure, with UK authorities expecting financial and crypto firms to trace the full route of Russia-linked money flows, not just screen for sanctioned names.
According to data from blockchain analytics providers, the use of intermediary wallets, decentralized exchanges, and mixers has increased in recent years as sanctioned entities seek to obscure the origin and destination of funds. In 2025, Grinex processed over $1.2 billion in both incoming and outgoing USDT transactions, highlighting the scale of activity that can occur outside traditional financial channels. These figures underscore the challenge regulators face in tracking and enforcing sanctions across complex, multi-jurisdictional crypto networks.
Sanctions compliance in the crypto sector involves more than just screening for blacklisted addresses or entities. As payment networks become more sophisticated, firms must develop the capability to analyze transaction flows, identify indirect exposure, and adapt to rapidly changing tactics used by sanctioned actors. This requires investment in blockchain analytics, robust KYC procedures, and ongoing staff training. The UK's proposed penalty increase is intended to incentivize firms to prioritize these controls, but effective enforcement will depend on the ability to keep pace with evolving evasion strategies and international coordination among regulators.
