Some help with a autograph found to be questionable.

I just recently subbed a few of my auto's. One of the cards I subbed was found to be questionable. I know for a fact that is legit since it was obtained in person. I was wondering what steps I should take to get this looked at again. The card has already been shipped back to me or I would send them an email to get a second opinion. If anyone can give me a suggestion on how to handle this I would really appreciate it. Thanks
16423647 N4: QUESTIONABLE AUTHENTICITY 1987 TOPPS TRADED TIFFANY 70T GREG MADDUX
16423647 N4: QUESTIONABLE AUTHENTICITY 1987 TOPPS TRADED TIFFANY 70T GREG MADDUX

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Comments
John
HOF SIGNED FOOTBALL RCS
I'm starting to agree with Ahmanfan, I'm not sure what PSA/DNA's batting average is for authenticating autos but I'm sure it's not 100%. I just like to display my auto's in PSA slabs so that's my real motivation - I've only sold 1 card from my personal auto collection.
I think I might try JSA if PSA isn't willing to take a second look at it.
<< <i>I think I might try JSA if PSA isn't willing to take a second look at it. >>
This might be your best bet...Donato
Donato's Complete US Type Set ---- Donato's Dansco 7070 Modified Type Set ---- Donato's Basic U.S. Coin Design Set
Successful transactions: Shrub68 (Jim), MWallace (Mike)
<< <i>I think I might try JSA if PSA isn't willing to take a second look at it. >>
Be sure to update us on how this plays out...