Currency Transaction Reports (CTRs), Suspicious Activity Reports (SARs), Registration of Money Services Businesses (RMSBs), and Designation of Exempt Persons (DOEPs) must be e-filed through the BSA e-filing system.
Money services businesses can choose to file Form 8300 and the Report of Cash Payments Over $10,000 Received in a Trade or Business electronically or on paper. However, it is highly encouraged that businesses e-file instead to increase efficiency.