Forgery

A fake stamp or overprint intended to deceive collectors.

Related Terms

Philately

The study and collection of postage stamps, postal stationery and related postal history.

Perforation

The rows of holes punched between stamps to make separation easier.

Imperforate

A stamp issued without perforations and requiring cutting from a sheet.

Watermark

A design embedded into stamp paper to help prevent counterfeiting.

Gum

The adhesive coating applied to the back of a stamp.

Original Gum

The stamp’s original adhesive layer as issued by the postal authority.

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