It’s to tell BPost to deliver the letter to the Priorij van Corsendonk urgently.
It’s called an airmail etiquette and it instructs foreign mail services that this is “air mail” (which should mean that it will be sent by airplane, though I don’t know if they actually do this for e.g. letters to The Netherlands). In theory this sticker might result in foreign mail carriers treating your letter with more urgency than non-air mail. Similar to how bpost has prior and non-prior.
Probably doesn’t do much in most cases but it doesn’t hurt either.
You can basically stick this onto any international envelope because all international stamps sold by bpost are “air mail”. They also have miniature versions of this blue sticker on the stamp itself, but the extra sticker is more visible I guess.
Maybe bpost offers non-air international mail to companies, not sure, but not via the stamp system.
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It’s to tell BPost to deliver the letter to the Priorij van Corsendonk urgently.
It’s called an airmail etiquette and it instructs foreign mail services that this is “air mail” (which should mean that it will be sent by airplane, though I don’t know if they actually do this for e.g. letters to The Netherlands). In theory this sticker might result in foreign mail carriers treating your letter with more urgency than non-air mail. Similar to how bpost has prior and non-prior.
Probably doesn’t do much in most cases but it doesn’t hurt either.
You can basically stick this onto any international envelope because all international stamps sold by bpost are “air mail”. They also have miniature versions of this blue sticker on the stamp itself, but the extra sticker is more visible I guess.
Maybe bpost offers non-air international mail to companies, not sure, but not via the stamp system.