Yeah, it's the return sticker!

I bought a m/b that had one and tried to return it. No, we won't take it back the serial #'s don't match.
All right, I went home got the bad m/b (serial # was not a match either) and went back.
It turned out, the cashier had keyed in the wrong m/b serial #. I ended up getting a store credit .
I maintained my cool, even though I was P.Off, and got the situation resolved in a positive manner.
Fry's has some great deals, just don't buy a product with a return sticker on it!
GilaM