In case anyone is interested, below is an example of the type of forgery that was sold by Stan's Sports Memorabilia of NJ back in the 90's.  go to the link, and check out the other items that have this banned COA attached:

http://www.ebay.com/itm/CARL-YASTRZEMSKI-AUTOGRAPH-BASEBALL-WITH-COA-AND-WOOD-DISPLAY-/161136742587?pt=US_Baseball_Fan_Shop&hash=item25847f90bb