Posted By:
robert aBlank backs on t206 are pretty darn rare. There are both blanked back cards that appear to be hand cut and also cards that appear to be factory cut.
The SL blank back that Trae posted a link to is more uncommon than a non SL t206.
I don't think they have a higher chance of being fake. You just have to look for the same signs of a reprint.
That being said, I've never seen a t206 reprint with a blank back.
Rob