A similar thing happened to a friend of mine who found some money in a supermarket. She saw it being written down in the book but when she asked a couple of weeks later what had happened about the money she found, the page it had been noted on had been torn out of the book.
I think it makes a mockery out of the honest person who takes the trouble to go in to hand it in, that some lazy, greedy, dishonest person just pockets it. The original owner may have gone back to ask if the money had been handed in and be told "no". Who can afford to lose £60?!