And that’s why eBay asks the social security number of any seller that hasn’t sold stuff in a while; this happened to a relative of mine- they got an email from eBay saying that they (the relative) had to call eBay and update their account.
I did some looking because I do have a few things I should sell there, and I see the new system is not optional. Whoah, I’ll bet that went over like a lead balloon when it was announced.