[swarmee]

Common reasons for decertification:
1) Card has been revealed as trimmed/altered/counterfeit by internet Velmas and PSA decertifies cert so it can be recalled and put into an Altered holder or cracked out if counterfeit.
2) Cards submitted to PSA at same time in quantity may have accidentally been given duplicate cert numbers and multiple copies are detected, leading PSA to request both cards be sent in for re-authentication and to move one to a new cert.
3) PSA slab counterfeiters may have used the number again and put in a lesser condition or fake card to pass it off as the PSA-graded card. Happened a lot with the guy from Mexico. Once PSA detects that a counterfeiter uses the same cert number, they decert the real cert and ask the original owner (and all counterfeit slab owners) to send the cards back in for re-authentication.
4) Card has been reported to PSA as Stolen.

Temporary reasons for decertification:
1) Glitch. There was a time when the PSA 8 Honus Wagner disappeared from the Pop Report for a few days, and we guessed that it might be at PSA getting moved into an Altered slab. That was incorrect, as PSA just said it was having a computer glitch.
2) Cards are being reviewed in the slab. Once they come in, PSA decerts it before determining if it deserves a grade bump.