A while ago, Topps anounced that Tribute to the Stars autograph cards would be inserted as a bonus hit in 2012 Topps Tribute. Because of the way they packaged the product, the cards aren't bonus hits any more. Topps released that they will make good on this. If you send in an autograph card that looks like this...
Then you can send it in to Topps and they will send you a pack of 2011 Bowman Sterling which has 2 autos and one relic with the card you sent in. This is great, but I'm not really sure why they don't just send you another pack of Tribute. A pack of Sterling costs less than a pack of Tribute, so it almost seems like a downgrade to me. Here is the address you can send these in to...
The Topps Company
Sports & Entertainment
Attn: Customer Support – 6th Floor
1 Whitehall Street
New York, New York 10004-2109
This offer expires on March 9, 2013 (if the world doesn't end hahaha).