If he was carrying over $10,000 they could have reminded him of his legal obligation to file a CMIR. But he wasn't. Carrying $4,700 isn't a reportable event and is none of the TSA's business. (In case you don't know banking regulations: 31 CFR 103.23 requires that a CMIR be filed by anyone who transports, mails, ships or receives, or attempts, causes or attempts to cause the transportation, mailing, shipping or receiving of currency or monetary instruments in excess of $10,000, from or to a place outside the United States. The term ``monetary instruments'' includes currency and instruments such as negotiable instruments endorsed without restriction. See 31 CFR 103.11(k).)