I lost a wallet when I was in my 20s. It had $2 in it along with my driver's license, some other ID and a credit card. Someone turned it in to a convenience store, which took the time to find me in the phonebook using the info on my drivers license (this was before the internet). The $2 was gone but the ID and credit card were still there. This was in the midwest in the U.S.
Also in the U.S. I was on a very early (pre-sunrise) morning bicycle ride and saw a woman's purse in the road, actually quite a way out in a street T-intersection and not really in front of a house. I picked it up and took it home, and then opened it to see if there was a way to find out who it belonged to. There was a ladies' wallet inside with some money and ID, and also a small daytimer (this was also before the internet or cell phones) with some contacts in it, so I called the first contact and was able to connect with the owner and get it to her at her work, she was a young lady working in a nearby grocery store bakery. She was super-thankful. I never found out how it got in the road, but figured that based on its location and that it must not have been there for very long or a motorist would have spotted it and stopped, that maybe she was leaving a party in the wee hours and put it on top of her car, but forgot and drove off, then it fell when she made a turn at that intersection.