Topps Fan favorite Autos help

I've been picking up quite a few of the Topps Fan Favorite cards for my PC over the last few years. I'm thinking of adding Fan Favorite Autos to my collection, but I'm concerned that they'd be easy to fake, since it appears the only difference is the auto itself. Does anyone know if there is something on the front or back of the card that authenticates the auto? Thanks
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It appears I didn't look close enough at the stamps. At first glance I thought it was the same stamp as the non-auto'd cards.
Alfawax thanks for the offer, I am looking for on-card authenticated