Hmm. That’s neat. But usually someone has a bank card or other membership card with a support line on it. Is there some reason to not just call one to report the found wallet?

The times I’ve found a wallet, I’ve called one of those support lines. The support person was able to contact their customer to give them my phone number. The customer called/texted me, and we arranged for them to pickup the wallet. This has worked every time to get the wallet back to its owner within a couple hours of my finding it with minimal inconvenience to me.