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The historical emphasis of the Service in Title 31 money laundering investigations has related to the failure to file or the false filing of Currency Transaction Reports ( CTRs ) ( Form 4789 ) , i.e ., the requirement that a financial institution file a CTR when a person conducts a currency transaction of more than $ 10,000 with the financial institution . This includes the filing of Currency Transaction Reports ( CTRs ) and Suspicious Activity Reports ( SARs ) . The institution must provide information about its BSA officer , policy , and compliance programs and must list filed Currency Transaction Reports ( CTR ) . As a part of the scheme , participants also file false IRS Forms 8300 and Currency Transaction Reports in the name of law enforcement officials and other individuals they seek to harass . At our request , IRS identified the 20 institutions that filed the largest volume of Currency Transaction Reports that had been marked suspicious in calendar year 1993 . These reports include Currency Transaction Reports and Foreign Bank Accounts Reports .