Grandson found in his mailbox a birthday card on the day of his birth from his beloved grandmother. In his eyes immediately caught the fact that the card was packed in one envelope on the back side which was very unusual message.
On the back side has been printed an apology for tainted letter
As experts say, is doing similar stuff with mail machine for automatic sorting of mail - it breaks down quite often.
Moral: please send money to relatives by payment systems.
Source: izismile.com