The term "airmail etiquette" derived from the French word Шаблон:Linktext ("label, sticker"), from which is also derived the English word etiquette ("rules of behavior").
Use
Because airmail etiquettes are just instructions to postal clerks, and have no monetary value, their printing and distribution need not be as carefully controlled as for postage stamps, and most are privately produced. The usual design is a plain blue oblong, with the phrases "AIR MAIL" and/or "PAR AVION" in white letters. Various airlines and hotels have also produced etiquettes.
The airmail etiquette may be omitted if airmail stamps are used on the letter, and in some cases even this is not necessary if a country sends out all its foreign mail by air. In some regions, such as the United Kingdom, one may simply write "PAR AVION -- BY AIR MAIL" on the envelope,[1] even though etiquettes are available free of charge from post offices.
The United States officially requires international First Class and Priority Mail letters to be marked with "AIRMAIL/PAR AVION".[2][3] This requirement is often ignored in modern practice since the United States Postal Service discontinued international surface mail in 2007;[4] all international mail from the US is now sent via airmail. Pre-printed airmail etiquettes are no longer produced by the USPS. If USPS customers purchase international stamps from self-service kiosks, from post offices, or online, the letters must then have "AIRMAIL/PAR AVION" written on the address side of the letter. This applies to both First Class Mail International and Priority Mail International services.[5][6]
Field, Francis J. Air Mail Labels (etiquettes). Sutton Coldfield: Francis J. Field, Ltd., 1940 32p. Series Title: The Aero Field Handbook; no. 5.
Jones, Frank G. Etiquettes: Par Avion - By Air Mail. London: Frank G. Jones Associates, 1992 40p.
Müller, Frank. Catalogue des etiquettes aéropostales: émises par les administrations postales, les compagnies de navigation aérienne, etc. Paris: La Maison de la poste aérienne, 1947 288p.
Postal Label Study Group. Mair Airmail Label Catalog.
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