Okay, this just made me laugh! I do this pretty often ... I write something down because my handwriting is still pretty good - but, if I forget where I wrote it I may write something else on top of it ... or with this Christmas card (that almost got sent ... except luckily I said - hey Steve will you sign this card too)! If you can't tell - I had written on the top of the card to one person ... then forgot and pulled out the pile of cards and wrote on the bottom to someone else!
You gotta laugh, right!