§ 1020.320 Reports by banks of suspicious transactions.

(a) General. (1) Every bank shall file with the Treasury Department, to the extent and in the manner required by this section, a report of any suspicious transaction relevant to a possible violation of law or regulation. A bank may also file with the Treasury Department by using the Suspicious Activity Report specified in paragraph (b)(1) of this section or otherwise, a report of any suspicious transaction that it believes is relevant to the possible violation of any law or regulation but whose reporting is not required by this section.

(2) A transaction requires reporting under the terms of this section if it is conducted or attempted by, at, or through the bank, it involves or aggregates at least $5,000 in funds or other assets, and the bank knows, suspects, or has reason to suspect that:

(i) The transaction involves funds derived from illegal activities or is intended or conducted in order to hide or disguise funds or assets derived from illegal activities (including, without limitation, the ownership, nature, source, location, or control of such funds or assets) as part of a plan to violate or evade any Federal law or regulation or to avoid any transaction reporting requirement under Federal law or regulation;

(ii) The transaction is designed to evade any requirements of this chapter or of any other regulations promulgated under the Bank Secrecy Act; or

(iii) The transaction has no business or apparent lawful purpose or is not the sort in which the particular customer would normally be expected to engage, and the bank knows of no reasonable explanation for the transaction after examining the available facts, including the background and possible purpose of the transaction.