The worker organizes a collection amongst the other postal workers, who dig deep and come up with 96 euro. They get it to her by special courier the same morning.
A week later, the same postal worker recognizes the same hand on another envelope. He opens it and reads: "Dear God, Thank you for the 100 euro. This month would have been so bleak otherwise. P.S. It was four euro short but that was probably those thieving b******s at the Post Office."