Found a fake slab - what would you do?

A friend asked me what I thought of a 1962 Mantle PSA 4 on an app called Depop. I did some poking around and found the exact same cert listed on Whatnot but the pic is without a doubt different. One of them is definitely fake but we don’t know which one. Will PSA investigate something like this if we send them links to both listings? Or would we just be wasting our time?

Note the top border differences…

Depop pic

Whatnot pic