Here is a common "Operation Bullpen" style Mantle forgery listed by eBay seller bobbyandstacy2009

COA from "Hollywood and Dreams"

http://www.ebay.com/itm/Autographed-picture-of-Mickey-Mantle-with-C...

Here is an AUTHENTIC version of this same photo from my personal collection, Mick sometimes signed this across the legs, and sometimes across the chest:

Here is another FORGERY example, same pose:

And another FORGERY EXAMPLE, same pose: