"the letter read: "Hi. It was me who urinated in the lift between 2004 and 2006.
"I know that there were a few grumpy faces and angry notes and I have a very bad conscience for the elderly man on one of the bottom floors who had to take the blame."
The man signed the note, which was verified as genuine by an acquaintance. He also left his phone number for residents to contact him"
I'm not suggesting this is what happened but If I was the "acquaintance" wouldn't this be a wonderful wheeze to wind up somebody.... provided you know their phone number.
It all smells a bit fishy to me... so to speak.