When I got my first apartement, I bought a washer and dryer on a "90 days same as cash" plan. They told me as long as I paid off the balance in 90 days, that I would pay no interest. However, it was set up as a 2 year loan, and I would receive monthly statements with the amount due as if I were going to pay it back over 2 years. This would include a frightening amount of interest.
I was very careful to pay back the entire amount before the deadline.
But I kept getting bills. They were for $0.00
After a couple of months, I called the company and asked WHY they were sending me bills for $0.00. Did they want me to send them a check for $0.00?
I was actually worried that somehow I *hadn't* paid the entire balance and it was showing the zero payment due because I was "ahead" on the 24 month payment plan and sometime in the future I would get this huge bill for the interest. But no, I had paid it. They said they were set up to send the bills for 24 months, because most people didn't pay it off in the 90 days, so I would keep on getting the bills for $0.00 until the 24 months was up.

They didn't know how to tell the computer to stop sending out the bills until the 24 months was up.
I have never bought anything "90 days same as cash" ever again! It gave me the willies to throw those bills away every month!!
Oh I just thought of another one!!
One year we WON the Reader's Digest Sweepstakes! Not one of those "you may be a winner, be sure and send in your entry" things, but we actually won. We weren't the grand prize winner, or even the first, second, third, forth, or fifth. I don't know what place we were...but our check was for...drumroll please....TEN CENTS!! Yep, 0.10! We got a CHECK made out to us for that amount!!!

WHY would they bother doing that? LOL!