That is actually hideous. I can't believe you're so smug and self satisfied at keeping someone else's money, when you know who they are and you know they're still alive.
The only time I've ever kept any money that I found is some 12 years ago. Myself and the kids - both school age at the time - were in the park (quite a large park on the edges of the town where we lived,) and I found a brown envelope in a bush on the edge of the park near the woodland.
The kids were running around behind me kicking a football about and I looked at this envelope, and there was a purse in it, bulging with banknotes. I sat and counted it out - there was almost £700 in in 20's and 10s. In the purse was a drivers licence that said (and this isn't the real name and address obvs,) 'Emily Jackson - 15 Peacock Rise.' The postcode was on it, and so I knew exactly where this property was.
So I collected the kids together about 10 minutes later, and dropped them off home. As this 15 Peacock Rise was only two miles up the road and only a mile from where we lived, I actually knocked on the door and asked for Emily Jackson. I didn't say why I was there or what I had or anything, I just asked for her.
The man who answered the door said he'd never heard of Emily Jackson! (I should probably say at this point that the drivers licence said 'Emily Jackson' was 24 years old.) So I said 'there's no Emily Jackson here then - she's around mid 20s???' He said 'no - no Emily Jackson here. I've lived here for 33 years and there's definitely no Emily Jackson here. I've actually only got one son and he's 31... I certainly don't have a woman in her mid 20s living here.' So I'm not gonna lie I took the money home, the purse home, and the envelope home, and I just kept it in the spare bedroom. Told no-one.
If I had heard on the Grapevine, in the papers, in the neighbourhood, online, or anything - that somebody had lost a purse in an envelope stuffed with nearly £700, I'd have quite happily handed it over. I didn't give it to the police because I wasn't completely sure that it would go back to the original owner.
Also it was really very odd that this drivers licence was registered to this Peacock Rise address, to Emily Jackson who was only 24 years old, yet the man I met said he lived there for over 30 years and he'd never heard of this woman. So I have a slight suspicion that that was a fake bogus drivers licence, and that might even have been drug money or something. So some 5 months later I started to spend the money. I put it towards train fares and 2 hotel rooms for several nights for me DH and the kids, for a trip to Edinburgh. Used the rest towards bills.
And I don't feel even remotely guilty about it coz as I say, nobody came forward for it and really believe it was a fake drivers licence, and I got a slight suspicion it was drug money.