[Snowman]

It really is silly that they ever offered any sort of a guarantee whatsoever, to begin with. You'd think they would just accept the fact that they are unable to detect most alterations by this point and just get rid of their guarantee program. It really is pointless. They should just be upfront and honest about what they can and cannot do and simply admit that their grades just represent a particular grader's opinion on a particular day and that there is a very wide range of expectations when sending in cards for grading.

I'd love to see a hobby "secret shopper" like the apparel and restaurant industries have where a mix of altered and unaltered cards are sent to every grading company and statistical reports get published with their results, showing each company's Type I and Type II errors (TPG said a card was not altered when it was, and TPG said a card was altered when it was not). I'd place my bets on SGC being by far the most accurate.