Embracing the concept of “keep the change,” the Transportation Security Administration said it collected more than $760,000 in unclaimed cash — mostly loose coins — from travelers who had forgotten the money after passing through airport security in the 2015 fiscal year.

The agency said it “makes every effort to reunite passengers with items left at the checkpoint,” but at times, property or loose change go unclaimed. The coins, for instance, were left behind when passengers emptied their pockets before going through metal detectors.

Money from other countries collected over the fiscal year, which ended Sept. 30, made up more than $9,200, which was converted to American currency, according to a T.S.A. report in March.

What will the agency do with the money? In 2005, Congress gave the T.S.A. the authority to use unclaimed money on security operations.