My son, Matthew was a car and hot wheels collector.  This certificate was found in the kids toybox and they said they didn't want anything now that they have a family of their own.  This is what the card reads:

OWNERS SERIES....CERFIFICATE OF AUTHENTICITY...This is to certify this 1:64 scale die-cast replica of the 2001 DeWalt Rookie Ford Taurus driven by Matt Kenseth is one of 7560 sequentially numbered Owners Series pieces...Sequential No 4124 … NASCAR.  Team Caliber OWNERS SERIES … Signed by Randy Duncan, CEO, Team Caliber, Inc.  ITEM # 0176228RY.  The certificate measures 3 1/2 inches long x 2 1/8 inches wide.  

This item might just complete your collection