Dang, this sucks. I always assumed that as long as it was F&F it was fine on the seller's side. I've never had an issue, but I usually only sell to people I don't know via F&F if I know of them in the community, or they have good reviews and have been a trusted Pinsider for some time. Anyone new to the site or rando off Facebook or something, there's no way. But, this is good information to have going forward.