This an authentic Joe Carter autograph. I took a close up of the signature, you're welcome to do some online comparisons. These were a limited edition collection, photos of the lot numbers are shown. The item "Autographed Joe Carter Legends of the Diamond Limited Edition Bobblehead ET" is in sale since Sunday, February 28, 2021. This item is in the category "Sports Mem, Cards & Fan Shop\Vintage Sports Memorabilia\Bobble Heads".
The seller is "bayview21" and is located in Port Elgin, Ontario. This item can be shipped worldwide.