I'll add one of the famous political money launderng schemes:
President Richard Nixon, running for re-election in 1972, formed "The Committee to Re-Elect the President" (CREEP), with HQ in Washington, DC. Individuals and corporations seeking favors from the Nixon Administration, who wanted to avoid public disclosure and laws limitating amounts of money given to politicians, brought bundles of cash to CREEP HQ. The money was parked in safes. Then couriers took it and opened accounts in Mexican and Caribbean that weren't required to disclose information to the IRS. CREEP's operarives then drew on those accounts to clandestinely pay for campaign expenses--including "dirty tricks."