The Treasury Department’s Financial Crimes Enforcement Network (FinCEN) might require financial institutions to implement new recordkeeping and reporting requirements regarding convertible virtual currency (CVC) mixing under a proposed rule.

On Thursday, FinCEN announced a notice of proposed rulemaking that would identify international CVC mixing as a class of transactions of primary money laundering concern. Doing so would mean domestic financial institutions and agencies must take “special measures” toward CVC mixing as directed by FinCEN under Section 311 of the Patriot Act.