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Anairmail etiquette, often shortened to justetiquette, is a label used to indicate that a letter is to be sent byairmail.
The term "airmail etiquette" derived from the French wordétiquette ("label, sticker"), from which is also derived the English wordetiquette ("rules of behavior").
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 forpostage 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 theUnited 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.
TheUnited 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 theUnited States Postal Service discontinued internationalsurface 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]
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