I handwrite (actually I print):
Track this bill with me
www.cdn-money.com

I've been a member for 8 months and I have 150 HITs.

I mark my husband's money also. I sometimes trade with the till at work. I would trade with my daughter, but she gets most of her money from me. LOL

I forgot to add, this is where I mark them:
Very top edge on front of bill, top border on back of older bill, on the blank ice beside the toboggan on the $5, below the doves on the $10, right above the serial numbers on back of the new $20.

[ message was edited on: 2005/03/14 ]