Label (philately)
In philately, label or coupon or tab is a part of sheet of stamps separated from them with perforation. It cannot be used for postage because it does not have face value and any indication of a postal administration that issued such stamps with labels. The notion of label should not be confused with the term "gutter" or with a margin of a stamp sheet.
Sometimes, label is also a stamp-like adhesive of no postal value, often used for promotional purposes.
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