An airmail stamp is a postage stamp intended to pay either an airmail fee that is charged in addition to the surface rate, or the full airmail rate, for an item of mail to be transported by air.[1]
Airmail stamps should not be confused with airmail etiquettes, which are affixed to mail as an instruction to the postal authority that the mail should be transmitted by air.
- ^ Miller, Rick. "Have airmail stamps fallen victim to success?". Linn's Stamp News. Retrieved 2009-05-02.