FI is a huge 49er fan so I thought I would send an invite to Steve Young's fan/foundation address to see if I could get a photo or response.
This is what I got today:

It says "Congrats X & Y, signed Steve Young". It will save me time on figuring out the groom's gift. Signature should be authentic since it was addressed to his charity foundation but even if it's not, it's a nice memento.
Here's the address if anybody else is interested:
Steve Young Forever Young Foundation 2239 Heavenly View Drive Henderson, NV 89014
Update: I sent the invite end of February and got the photo on May 5.