The Russian ruble-backed stablecoin A7A5 processed more than $110 billion in cumulative onchain transactions despite Western financial sanctions, according to new research from blockchain security firm CertiK. CertiK described A7A5 as one of the clearest examples of a sanctions-evasion stablecoin ecosystem, linking it to Russian cross-border settlement companies.
The stablecoin's holder count grew from 13,000 to 29,000 wallets between February 2025 and May 2026 — more than doubling in 15 months. CertiK estimates A7A5 captured approximately 43% of the global non-US dollar stablecoin market, a notable concentration for a single fiat-backed instrument operating in a sanctioned currency.
Western sanctions imposed on Russia following its 2022 invasion of Ukraine targeted financial institutions, correspondent banking, and SWIFT access. A7A5's growth suggests these measures did not meaningfully constrain blockchain-based ruble settlement. CertiK's report links A7A5 to Russian cross-border settlement companies — entities that may use it to move value internationally outside sanctioned financial rails.
CertiK noted that the EU's 19th sanctions package, adopted October 23, 2025, explicitly prohibited transactions involving A7A5 and similar ruble stablecoin instruments. Despite this prohibition, CertiK's data indicates continued transaction growth through May 2026.
The A7A5 case highlights a structural challenge in stablecoin regulation: enforcement requires either controlling the issuer, the underlying blockchain, or the on/off ramps to fiat. When an issuer operates in a sanctioned jurisdiction, issues tokens on permissionless infrastructure, and primarily settles in non-Western markets, traditional sanctions tools have limited reach.
This is not unique to A7A5. Chainalysis previously identified Iran's Nobitex exchange, sanctioned by OFAC in 2025, as processing significant stablecoin volumes through similar mechanisms. The pattern — sanctioned actors using permissionless blockchain rails to move value — has become a recurring regulatory concern for both the US Treasury and the EU's financial enforcement bodies.
For regulated USD stablecoin issuers like Ripple (RLUSD), Circle (USDC), and Paxos (PYUSD), the A7A5 data has indirect implications. It demonstrates growing global appetite for blockchain-native stablecoins for cross-border settlement — demand that regulated issuers are competing to capture with compliant products. It also reinforces pressure on Western regulators to build international coordination mechanisms, such as the EBA-NYDFS MOU signed June 3, to monitor stablecoin flows across jurisdictions.
The growth of unregulated alternatives also makes the regulatory case for compliant stablecoins: if the transaction volume is going to occur regardless, regulators have a strong interest in ensuring it flows through supervised instruments. RLUSD's recent inclusion in Mastercard's global settlement network positions it as the regulated alternative to exactly the kind of infrastructure A7A5 represents.
CertiK's $110 billion figure represents cumulative onchain transaction volume, not assets under management or outstanding supply. Cumulative volume can be significantly higher than circulating supply due to transaction velocity. CertiK's research is based on blockchain data analysis and should be considered alongside primary-source verification of specific claims.