Found a man's wallet today with about $250 in cash in it. Two defunct credit cards (the banks don't even have enough account information to contact the man), a non-government-issued non-US-resident state ID (private company; didn't know such a thing existed), and a certificate that the owner is a resident of Brazil.

None of my attempts to reach this guy have yielded anything. I posted signs where I found the wallet that say GLEGORY COSTA [yes, it's really spelled that way]! I found your wallet--please contact me at [number] to verify the contents so I can return it to you.

Obviously I'd rather this guy get his wallet & all contents back. That's what I fervently want. But if I can't find him at all, then what?