Here is an interesting article about some of the most prolific mistakes by Panini.
http://www.sportscardradio.com/panin...cams-mistakes/
For those of you that prefer a summation it includes the following:
1) Fake Game used
2) Fake Autos
3) "Event worn" materials being labeled as "game used" - which, to me, really just sounds like an unprovable, passable, excuse for using fakes.
4) Cards being held back and not released in the original release of the product, or released in the wrong product.
5) And of course the Auto Pen