Before I continue, below are links showing hundreds of examples of forged Mickey Mantle baseballs, photos, etc. found on Ebay (the most dangerous place to buy autographs if you're a casual collector or impulse buyer).

https://live.autographmagazine.com/forum/topics/ebay-mantle-dimaggi...

https://live.autographmagazine.com/forum/topics/examples-of-mickey-...

https://live.autographmagazine.com/forum/topics/most-common-mantle-...

Check out the below forged Mickey Mantle and Ted Williams baseball listed by Ebay seller Hammerosu9.  These are mass-produced and common Mantle/Williams forgeries.

The seller also shows a so-called Beckett Signature Review form.

It is a fake Beckett Signature Review form.

https://www.ebay.com/itm/394644573000?_trksid=p11021.c100851.m5053&...

Fake Beckett Signature Review form.