Is it true that the Nuggets will send you a Chauncy Billups auto for free with the fan pack via email?

no never heard of them sending that out, let alone sending out fan packs

No chance it's authentic if they send out at all.

Probably a printed signature in anything at all

Yeah Mavs sent out Dirk preprints.
So I doubt other teams would send out authentics.

I sent to Billups himself and got an autopenned 8x10