Earlier quoted context omitted.
I once found a wallet on the sidewalk outside a mall in Japan. I tried to drop it at the mall's lost and found, but the security guard there took me with him to a police box. The policeman there took me to the local police station, and we spent the next hour filling out a report. They were all very friendly and appreciative that I turned it in, but it was really quite an ordeal. If I were to find something valuable a…
I think this might have more to do with you not being one of the locals. A good 'hack' to this might be to pick a set of 2-3 local looking people and loudly point out the item in question so that someone else can deal with it.
Technically no one should ever sign a blank sheet, ever, but that could be done, I guess.