Double Transfer "Error" $1

Not interesting unless you are into scamming people.

It is done with a color printer.

The giveaway, among others, is the doubled ONE under the seal. That is part of the intaglio plate.

I'd inform the seller first, maybe they're the ones that got scammed.

At least he is somewhat honest in his description.

Sometimes these get bid up by people who do know they are not genuine errors who have no intention of going through with the transaction. They bid it up to protect unwary buyers, so they can tell the seller off and leave negative feedback.

Here are some of the other tells on these notes:

The color of the second set of numbers is way off.
The second overprints are not crisp like the first ones are.
While the treasury and fed seals are both applied in the third printing, they are applied by different machines so doubling of both is unlikely unless the sheet was fed through twice (very unlikely) in which case the second set of serial numbers would not be the same.

I have advised the seller in the past that whoever made these fake errors know nothing about the BEP printing process, as it is impossible to have a double 3rd print, along with the black "ONE" doubled from the 2nd print..