Hungarian Overprint Bleed Through

Should I assume that any Hungary Occupation stamps that the overprint has bled through to the back are forgeries?

Hello, No this does not have to be a forgery. It could very well be a situtation which the Germans call abklatsch. Basicly they were printing the overprint on the stamps and somewhere during the proces a sheet was not fed into the machine the machine printed and the ink was pressed on the other side of the machine where the gumside of the sheet lies. Then a sheet of stamps did go properly into the machine and the machine printed not only the original overprint, but it also pushed the ink left in the printingmachine onto the gum side. This is one of the possibilities that could have happened to your stamp. Excuse My English. Kind reagrds, Johan.

Johan, in English it is called an offset. Excellent description, though!

Not necessarily; this is not a "bleeding through," it's rather an imprint from the underlying freshly printed stamp. This kind of printing error (which Germans call "abklatsch") results from previous sheet of stamps not being removed while the next sheet is printed. This error is possible whenever stamps or overprints are made in sheets, genuine or not.

Hmmm. That's an almost perfect alignment of underlying overprint with the overprint on this stamp to produce a near perfect offset. Only the OP or a larger scan could to confirm this.