My daughters and their friends are the "queens" of losing things at Disney World. One daughter lost her camera (with it's Pepperidge Farm Fish sticker). We don't know where she lost it, but Lost and Found had it. This same daughter lost her autograph book and somebody turned it into Lost and Found.
My other daughter's friend left her Disney bag on the parade route one night after sitting down to watch the parade. The bag contained her park ticket and "all her money". A Cast Member found it and the girls were able to retrieve it.
Years later, my daughter left her cellphone in the lobby at Port Orleans Riverside. Again, somebody turned it in and she got it back.
None of these things had names and addresses on them. But, there were happy endings anyway.
Now, all of our things contain labels with name, address and cellphone numbers on them.
Just about a month ago, I left my digital camera on a bench in
Disneyland. My husband went back to look for it. There was a lady standing there "guarding" it and hoping that the owner would come back to retrieve it.
I highly recommend that everything, including autograph books, have names, addresses and telephone (actually cellphone) numbers on them. We have people at Disney World and Disneyland to be incredibly honest.
Thank you to all those people!