Correo Argentino, the mail service, has an office in most neighborhoods; some locutorios (phone centers) serve as collection points and sell stamps. Mail delivery isn't dependable: it can take 6 to 21 days for standard letters and postcards to get to the United States. Regular airmail letters cost 4 pesos for up to 20 grams.
If you want to be sure something will arrive, send it by correo certificado (registered mail), which costs 10.75 pesos for up to 20 grams. Postboxes are dark blue and yellow, but there are very few that are not directly outside—or even inside—post offices. Valuable items are best sent with express services like DHL, UPS, or FedEx—delivery within one to two days for a 5-kilogram (11-pound) package starts at 550 pesos.
Argentina's post-code system is based on a four-digit code. Each province has been assigned a letter (the city of Buenos Aires is "C," for instance) that goes before the number code, and each city block is identified by three letters afterward (such as ABD). In practice, however, only big cities use these complete postal codes (which look like C1234ABD; the rest of Argentina uses the basic number code (1234, for example).
Correo Argentino (www.correoargentino.com.ar.)
Federal Express (www.fedex.com.)
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