I have been using my debit card for almost every transaction for a few years now and have realised several problems with them. They use the familiar credit card model. Unfortunately, credit cards weren't designed to be used every day for almost every transaction.

After receiving my latest replacement card last May(2005), the signature had worn off by August. Over time I have used different pens and inks to sign my card, from ballpoint ink pens to permanent markers. They all wear off in only a matter of months.