Money laundering acknowledgement slip records receipt of sealed evidence envelopes with sender details and adjudicating authority signature. Form IV is the prescribed acknowledgement slip under the Prevention of Money Laundering Rules to document receipt of a sealed envelope by the Adjudicating Authority, requiring serial number, envelope number and date, sender designation, date and time of receipt, signature and name of the Adjudicating Authority or designated officer, and office seal, together with addressee details.