Argentina Post Tracking

Correo Argentino is Argentina's designated postal operator, the only carrier bound by law to a universal postal service reaching all 23 provinces and the Autonomous City of Buenos Aires at an accessible price. Argentina Post tracking runs on its Track & Trace system, which carries ordinary parcels alongside two flows no private courier handles at the same scale: national identity documents and passports delivered for RENAPER, and the "puerta a puerta" (door to door) import channel through which personal purchases from abroad are cleared by ARCA customs. Its Centro Postal Internacional (International Postal Centre) at Monte Grande, opened jointly with the customs authority in July 2022, is built to process up to 45,000 international packages a day. The network spans more than 1,400 branches and postal units, and Mercado Libre parcels move on a separate tracking stream with an 18-character code instead of the standard postal piece number.

Argentina Post Tracking Number Format

An Argentina Post tracking number is 13 characters long: two letters, nine digits, then two more letters. Correo Argentino calls it the número de pieza, the piece number, and its official FAQ states the structure directly.

"It is made up of 2 letters at the start, followed by 9 numbers, and ends with 2 letters. (example: CU045105363AR)" (Correo Argentino, Preguntas Frecuentes, translated from Spanish, 2026.)

The trailing two letters are the ISO country code of the post that created the label, so an item posted in Argentina ends in AR. This is the Universal Postal Union S10 standard, which is why a parcel posted in China reaches Buenos Aires with a code ending in CN and one from Spain ends in ES. The code is not re-issued when an item enters Argentina.

The two leading letters identify the product family in Correo Argentino's own catalogue. The domestic Track & Trace form offers 53 prefixes in its dropdown, among them CC, CD, CP, EE, RR and SD. Correo Argentino publishes no public prefix-to-service key, so a prefix on its own does not reliably identify which service was used.

Two other identifiers exist alongside the postal piece number. Mercado Libre shipments carried by Correo Argentino use an 18-character alphanumeric code issued by the marketplace. DNI and passport deliveries are traced by the application number printed on the RENAPER receipt as "IDtrámite", not by a piece number at all. The synonyms readers encounter are número de pieza, número de seguimiento and código de seguimiento.

Where to Find Argentina Post Tracking Number

The piece number is printed on the adhesive barcode label applied at the counter and repeated on every receipt the branch issues.

• The oblea autoadhesiva, the adhesive barcode label stuck to the parcel, where the nine digits appear separately from the two-letter prefix.
• The counter receipt handed over at the branch when the item is posted.
• The shipping confirmation email from an online seller, where the carrier is named as Correo Argentino.
• The MiCorreo account dashboard, for labels quoted and paid online.
• The Mercado Libre order detail page, which shows the 18-character code for shipments moving through Correo Argentino.
• The arrival notification email or telegram sent for an inbound international parcel held for customs.

An order number issued by a shop is not a postal piece number and returns nothing in Track & Trace. On the domestic form the prefix is chosen from the dropdown and only the nine digits are typed into the field, so a shorter number is padded with leading zeros to reach nine digits.

"Enter only the nine numeric digits shown on the adhesive label, omitting dots or spaces." (Correo Argentino, Track & Trace domestic form instructions, translated from Spanish, 2026.)

Argentina Post Tracking Number Example

Correo Argentino runs eight separate tracking forms, and the number format depends on which one applies. The patterns below are the ones the operator itself documents.

Because no prefix-to-service map is published, the leading letters should be read as commonly seen patterns rather than a guarantee of the service used.

Argentina Post Tracking Status Guide

Correo Argentino's Track & Trace displays events in Spanish, and a tracked item passes through roughly a dozen stages between counter and doorstep. The table pairs each stage with what it means for the parcel.

Why Argentina Post Tracking Is Not Updating or Not Working

Most reports of Argentina Post tracking not updating resolve to one of the causes below rather than to a lost parcel.

Sunday maintenance window. Correo Argentino takes Track & Trace down for maintenance every Sunday from 11:00 to 13:30, and warns on the tracking form that lookups for some items will fail during that period. A search that returns nothing on a Sunday around midday is almost always this, not a missing item.

The number was entered in the wrong form. Eight separate lookup forms exist: domestic, domestic Plus, outbound international, inbound international, DNI, passport, Mercado Libre and e-commerce. An inbound international code typed into the domestic form returns no result even though the item is moving normally.

The form rejects the number. The domestic form accepts exactly nine digits and rejects dots and spaces, returning the error PIEZA MAL INGRESADA. A number with fewer digits has to be padded with leading zeros; the message means the input was malformed, not that the parcel does not exist.

Awaiting the first scan. A label quoted in MiCorreo or generated by an online seller exists before the parcel does. No events are recorded until the item is physically admitted at a counter, which is why a fresh number often shows nothing for a day or two.

Customs clearance. An inbound parcel stops at "en gestión aduanera" and stays there until the recipient acts through the international shipments portal. Nothing moves while the declaration is outstanding, and the charge invoice must be settled by midnight of the day it is generated.

Failed delivery attempt. After an "Aviso de visita" (attempted-delivery notice) the item goes to a branch and is held for 5 business days. Tracking then stays static until it is either collected or returned to the sender.

The item is waiting at a branch you are not expecting. The branch network is smaller than it was, so the branch holding an item after a failed delivery may be further from the address than the counter a recipient has always used. The tracker is not stuck; the item is sitting at the point named on the Aviso de visita, and it stays there for 5 business days.

Genuinely delayed or lost. When scans stop for an extended period, the sender is the first point of contact because the postal contract is with them. A formal claim can then be filed with Correo Argentino, and escalated to ENACOM, the postal regulator, if the operator does not respond within 10 business days.

Services and Delivery Times Compared

Correo Argentino runs four tracked shipping products that account for most parcels, plus letter services that carry Track & Trace for legal proof rather than for logistics.

Delivery and Transit Times

Correo Argentino quotes 2 to 5 business days for Paq.ar Clásico and 1 to 3 business days for Paq.ar Expreso anywhere in the country, with the real figure set by the origin and destination pair. Encomienda Correo Clásica is quoted at 3 to 6 days. All of these are the operator's own estimates, not guarantees.

Distance drives the spread. Deliveries inside AMBA, the Buenos Aires metropolitan area, and between the large centres of Córdoba, Rosario, Santa Fe and Mendoza sit at the fast end of each band. Routes into Patagonia, meaning Neuquén, Río Negro, Chubut, Santa Cruz and Ushuaia in Tierra del Fuego, and into the far north through Jujuy, Salta, Formosa and Misiones, run at the slow end and are the legs where a parcel most often sits at "en tránsito" for several days between scans.

International timings are set mainly by the customs step, not the flight. EMS is quoted at 5 to 7 days depending on origin and destination, but that clock covers the postal legs only. An inbound parcel selected for customs control waits for the recipient to act, and Correo Argentino publishes no end-to-end commitment for inbound international mail, because the origin post, the airline uplift and the ARCA clearance all sit outside its transit promise.

Failed Deliveries, Undelivered Items and Claims

Standard Correo Argentino services make two delivery attempts, and on Expreso the second follows the first about 24 hours later. When both fail, an Aviso de visita directs the recipient to a branch, where the item is held for 5 business days before it is returned to the sender.

Items that cannot be delivered and are never collected become piezas en rezago (undeliverable dead-letter items). Correo Argentino holds them for 2 months, during which either the sender or the addressee can request recovery. If nobody claims the item in that window it is formally declared in rezago and opened, and the operator publishes monthly lists of the pieces reaching that stage, split by category for certified letters, control items and parcels.

Claims for a lost or damaged item start with the operator. A claim must be raised with Correo Argentino first, and the operator has 10 business days to respond. If no reply arrives or the reply is unsatisfactory, the complaint escalates to ENACOM, the national communications regulator, through the TAD remote-procedures platform.

The claim window is one year for domestic items, counted from the day after the service was requested, and six months for international items delivered by the official post. Argentine postal law provides compensation only for registered pieces. For a declared-value item that is lost or destroyed outright, compensation covers the postage refund plus the declared amount; where the damage is partial, it covers the value of the damage.

Which Countries Does Argentina Post Deliver To?

Argentina Post international tracking works in both directions because Correo Argentino is Argentina's designated operator inside the Universal Postal Union, which Argentina joined on 1 April 1878 and which today has 192 member countries.

Domestically the operator is obliged by law to serve the entire national territory. Its network of more than 1,400 branches and postal units reaches Buenos Aires and CABA, Córdoba, Santa Fe and Rosario, Mendoza, Tucumán, Salta and Jujuy in the north, Misiones, Corrientes, Entre Ríos, Chaco and Formosa in the northeast, Santiago del Estero, Catamarca, La Rioja, San Juan, San Luis and La Pampa in the centre, and Neuquén, Río Negro, Chubut, Santa Cruz and Tierra del Fuego across Patagonia.

Internationally, a Correo Argentino item is carried to the destination country and handed to that country's own post, which performs the final delivery and feeds scans back through the UPU International Postal System. Tracking continues under the same 13-character number, but the events after handoff are generated by the receiving post, which is why the event language and the level of detail change partway through a journey.

• Domestic: all 23 provinces and the Autonomous City of Buenos Aires.
• South America: Brazil, Chile, Uruguay, Paraguay, Bolivia, Peru and Colombia. Items to Montevideo are handed to Uruguay Post for final delivery.
• North America: the United States, Canada and Mexico.
• Europe: Spain, Italy, Germany, France and the United Kingdom, the destinations that carry most of Argentina's diaspora mail.
• Asia Pacific: China, Japan and Australia. Inbound volume from China is far larger than outbound, and most of it originates with China Post.

Cross-Border Customs and International Handoff

Every inbound postal parcel passes through the Centro Postal Internacional at Monte Grande, in Buenos Aires province, which Correo Argentino opened jointly with Argentine customs in July 2022 with capacity for 45,000 international packages a day. At the time it opened, the centre was handling around 6,400 packages and more than 15,000 letters arriving from abroad each day, against roughly 500 packages and 1,500 letters going out.

Outbound items carry a UPU customs declaration. Correo Argentino requires one whenever an international item exceeds 100 grams or a declared value is requested, and the item is then sorted at the Centro de Tratamiento Postal (postal treatment centre) at Monte Grande before being flown to the destination country.

Inbound personal purchases run through the "puerta a puerta" regime administered by ARCA, the Argentine tax and customs authority. Each shipment carries a franchise of USD 50, and the first 12 shipments in a year are eligible for it. Above the franchise the buyer pays a tax equal to 50% of the excess, and once the 12 franchised shipments are used up the tax is 50% of the whole purchase. The regime caps a shipment at USD 3,000 in total value and 20 kg, and a Correo Argentino service charge applies on top.

The private-courier regime is a separate channel with different numbers, which is why parcels from the same seller can be taxed differently. Under it, shipments up to USD 400 FOB are exempt from import duty and the statistical fee, though VAT still applies, and the allowance runs to five shipments per calendar year per person, up to 50 kg per package and a maximum of three units of the same kind. Parcels from AliExpress regularly arrive through both channels depending on how the seller ships them.

Once a parcel is flagged for customs control, the recipient is notified by email or telegram and has two routes. They can collect it in person at a branch operating under customs control, or authorise Correo Argentino to represent them before the customs authority (Aduana), in which case the operator completes the release and delivers the item to the address. If the deadline stated in the arrival notice passes without action, the parcel is returned to the country of origin.

Marketplace Collaborations

Mercado Libre is the marketplace Correo Argentino serves most visibly: it is the only merchant with a dedicated entry in the Track & Trace form list, and its parcels are looked up with an 18-character alphanumeric code rather than the 13-character postal piece number. A separate "Paquetería e-commerce" form exists for online-retail parcels handled outside that integration.

The relationship is also competitive. Mercado Libre's logistics arm, Meli Log S.R.L., is itself a registered postal operator with national and international coverage, so the marketplace can carry its own mail rather than depend on the incumbent. For a buyer this matters at the tracking stage: a Mercado Libre order may travel on Correo Argentino under an 18-character marketplace code, or on the marketplace's own network, and the order detail page is the only place that says which.

Alongside the postal network, OCA and Andreani are the two private carriers most often selected for Argentine e-commerce, and OCA shares the RENAPER document-delivery contract with Correo Argentino, with the applicant's province determining which of the two carries the DNI or passport.

Cross-border marketplaces reach Argentina mainly through the postal channel rather than through express couriers, because the puerta a puerta franchise is cheaper for low-value goods. Parcels from Shein, Temu and AliExpress make up a large share of the inbound flow into the Centro Postal Internacional, and they arrive under the origin post's S10 number rather than an Argentine one, which is why the tracking code on those orders ends in CN rather than AR.

Where a Correo Argentino Parcel Is Held and Collected

Correo Argentino's branch network is smaller than it once was, and the practical effect lands at exactly one point in a parcel's journey: collection. Delivery is still attempted to the address, the universal service obligation still covers all 23 provinces and CABA, and the piece-number formats, the eight Track & Trace forms and the quoted transit times are unchanged. What has changed is that the branch holding an item after a failed delivery is not necessarily the branch that used to serve the address.

So read the tracking record rather than assume the counter. The Aviso de visita left at the door names the branch, and the A disposición en sucursal (held for collection at the branch) event names the same point in Track & Trace. That is the authoritative answer to where the parcel is, and in rural provinces it can be a substantially longer trip than the branch a recipient has always used.

Act inside the hold. A branch keeps an item for 5 business days from the date of the Aviso de visita and then returns it to the sender; a longer journey to the counter is not a reason the hold is extended. Collection needs the piece number and identity documents. A recipient who cannot reach the branch in time is better off asking the sender to re-dispatch the item than letting it lapse, because an item that is neither delivered nor collected becomes a pieza en rezago, is held for two months, and is then formally declared in rezago and opened.

Two collection cases work differently. An inbound international parcel flagged for customs is collected at a branch operating under customs control, not at any branch, unless Correo Argentino is authorised to clear it and deliver to the address. And a DNI or passport carried under the RENAPER contract is redirected to the nearest branch of whichever carrier holds it, Correo Argentino or OCA, after two failed visits, which is why the document tracker and the parcel tracker can point at different counters.

About Argentina Post

Correo Oficial de la República Argentina S.A., known by its trading name Correo Argentino, is Argentina's designated postal operator, a state-owned company overseen by the Jefatura de Gabinete de Ministros and legally obliged to provide the universal postal service across the entire national territory at an accessible price. Its own figures put the network at more than 1,400 branches and postal units.

Postal service in the territory dates to the Correo Mayor de las Indias in 1514, with regular service in the Río de la Plata from 1748. Bruno Ramírez was appointed the first letter carrier in Buenos Aires in 1771, a date now marked as the Día del Cartero. Bernardino Rivadavia created the Dirección General de Correos, Postas y Caminos on 1 July 1826. The post merged with the telegraph service on 7 April 1876, when the Ley de Correos N° 816 modernised it. Construction of the Palacio de Correos began in 1889, it was inaugurated on 28 September 1928, and it was declared a National Historic Monument in 1997.

The modern corporate history runs through three names. The Empresa Nacional de Correos y Telégrafos (ENCOTEL) was created in 1972 and converted into ENCOTESA, Empresa Nacional de Correos y Telégrafos S.A., by decree 2793 in 1992. In 1997 ENCOTESA's services were handed to a private concession set initially at 30 years, operated by the Sociedad Macri (SOCMA) group under the name Correo Argentino S.A. That concession contract was rescinded in 2003 and Correo Oficial de la República Argentina S.A. was constituted in its place, keeping the commercial name Correo Argentino. The operator is state-owned today, and its branch network is smaller than it was at its peak.

Argentina has been a member of the Universal Postal Union since 1 April 1878, and Correo Argentino is the country's designated operator within it. It exchanges tracking events through the UPU International Postal System (IPS), runs the Express Mail Service for priority international parcels, and can be reached nationwide on 0810-777-7787.