I received an iPod Nano for Christmas a few years ago, and with it was a 3 year extended warranty plan from Target, which was $20, that promised to repair the iPod in the event of any damage over the next 3 years so long as there is no physical or liquid damage.
Long story short, before about 3 weeks ago, I had to send the iPod in 4 times. The warranty promises to refund the purchase price if you have to send it in 3 times for the same problem. The first 4 times were 4 different problems. Whatever, it was repaired, no complaints.
Now, 2 weeks ago. I have to send it in again for a problem I had previously (Everything on the screen was mirrored and flipped upside down). I sent it in, received it back a few days later. They refused to fix it, said my warranty is no longer valid, and thats that, with basically no detail.
So, I call the place (Logistics) with the number they provided me. After about 5-10 minutes on hold, I talk to someone and ask him whats going on. He tells me they found liquid damage in the unit, which voids the warranty.
First of all, I never got any liquid in the unit. I know some people will think "Oh, I probably got some water in there sometime" and move on. However, this is the 5th time I sent it in, which means the liquid damage must have occurred between the 4th return and the 5th shipment. This period of a few months did not involve any liquid contact with the unit.
It's rather convenient that this "test" only came up positive once I sent the item in for the same problem a second time which would put me in a position to get a refund if it happened again, and never came up positive while I was getting different issues. Now, I have an iPod with a load of problems, no warranty, and $20 wasted.