It was three months ago, he would have had to have filed a not-as-described. Maybe he still can. Maybe with his card company, but I don't think so. It is obviously a forgery so a shame.
Not that this is any consolation, but I've gotten stung twice: once on a RFK signed dinner program, the other on a Joan Crawford that turned out to be secretarial. It might not be a stretch that some collectors have been duped at some point in time. I stress "some," not "all."