Argentina

CBU in Argentina: The 22 Digits, CVU and Alias Explained (2026)

Updated Published 5 min read

TL;DR

A CBU is a bank account number, a CVU is the same for a wallet like Mercado Pago, and an alias is a short nickname pointing to either, all on Transferencias 3.0 (instant, free, 24/7). Normally you need a DNI to have one. With CacaoCash you can send to any alias, CVU or CBU using a passport; receiving pesos to your own alias needs a DNI today.

If you've spent a week in Argentina, you've heard it: "pasame tu alias" or "te paso el CBU". Someone wants to pay you, or you want to pay them, and suddenly there's an acronym you've never seen. This guide explains what alias, CVU, and CBU actually mean, how they fit together, and how foreigners can send pesos with them, without a DNI. With an app like CacaoCash you can send pesos to any alias, CVU or CBU from a USD balance, with no DNI or Argentine bank account.

TermWhat it isWhere it livesWhen to ask for it
AliasA nickname like juan.perez.mp that points to a CBU or CVUAny bank or walletAlways ask for this first. It is what Argentines share.
CVU22-digit key of a digital wallet accountMercado Pago, Ualá, Naranja X, Personal PayMost individuals and freelancers
CBU22-digit key of a traditional bank accountBanks (Galicia, Santander, Nación, BBVA…)Landlords, companies, anyone paid into a bank

All three land in the same instant transfer system, so it never matters which one you get: pesos sent to an alias arrive exactly like pesos sent to the CBU behind it.

CBU, the bank account number

A CBU (Clave Bancaria Uniforme) is a 22-digit number that uniquely identifies a traditional bank account. It's the original way to route a transfer in Argentina. You'll be asked for it when paying invoices, rent, or anyone who banks the old-fashioned way.

What the 22 digits of a CBU mean

A CBU has two blocks: the first 8 digits identify the bank and the branch, and the last 14 identify the account. Each block ends in a check digit, which is how a banking app catches a typo before the money leaves.

DigitsWhat they are
1 to 3Bank code, for example 011 Banco Nación, 007 Galicia, 072 Santander, 017 BBVA
4 to 7Branch
8Check digit for the first block
9 to 21Account number (13 digits)
22Check digit for the second block

A CVU uses the same 22-digit layout, but it always starts with 000 followed by the code of the wallet that issued it. A Mercado Pago CVU, for example, starts with 0000003100. That's the quickest way to tell them apart: if the number starts with 000, it's a wallet; otherwise it's a bank account. Either way, you can send pesos to it the same way.

CVU, the wallet version

A CVU (Clave Virtual Uniforme) is the exact same idea, also 22 digits, but for a virtual account: a digital wallet like Mercado Pago or Ualá rather than a bank. Functionally, sending to a CVU and sending to a CBU feel identical.

Alias, the human-friendly nickname

Nobody wants to dictate 22 digits. An alias is a short, memorable nickname, words separated by dots, like maria.flores.mp, that points to a CBU or CVU behind the scenes. When you "pass your alias," you're just handing over an easy label for your account.

How they all connect: Transferencias 3.0

All of these live on top of Transferencias 3.0, Argentina's interoperable instant-payment rail. It means a Mercado Pago wallet can pay a bank account, a bank can pay a wallet, and an alias can point anywhere, all instantly, free, and around the clock. It's why money moves so smoothly between Argentines.

The catch for foreigners

To have an alias, CVU, or CBU, you need an Argentine account, and that needs a DNI. So foreigners can read all the acronyms they like and still have nothing to give when someone says "pasame tu alias."

How CacaoCash fits in

CacaoCash lets foreigners use the sending side of this system with a passport, no DNI:

Step by step, with costs against a wire and Western Union: how to send money to Argentina from abroad.

  1. You can send pesos to anyone's alias, CVU, or CBU straight from your USD balance.
  2. Everything converts at the crypto dollar rate, with a 2.5% fee shown before you confirm (see fees), so you still get ≈6% to 10% more pesos than at the non-resident card rate (October 2026).
  3. Receiving pesos to your own alias needs a DNI today: CacaoCash does not give foreigners an alias or CVU to receive. See how to receive pesos as a foreigner for the options that work.

In short: the same instant peso system Argentines use, open for sending from a dollar balance. The person you pay receives a normal transfer and pays nothing. And when a merchant shows a QR instead of asking for an alias, you can pay any Argentine QR without a DNI the same way.

Frequently Asked Questions

What's the difference between a CVU and a CBU?

A CBU points to a traditional bank account; a CVU points to a virtual wallet (like Mercado Pago). For sending and receiving, they work the same way, and an app like CacaoCash can send pesos to either one.

Is an alias just a nickname for those numbers?

Yes. An alias is a short, readable label that routes to a CBU or CVU so nobody has to share 22 digits.

Can a foreigner get an alias without a DNI?

Not today. Having your own alias to receive pesos needs an Argentine account, and that needs a DNI. With CacaoCash you can still send pesos to any alias, CVU or CBU using your passport.

Ready to pay like a local?

CacaoCash lets you scan any QR in Argentina, no DNI, no local bank account needed.

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About the author

Simon Gómez, founder of CacaoCash

Simon Gómez

Founder of CacaoCash. Simon has lived in Argentina as a foreigner and built CacaoCash so expats and nomads can pay like locals, no DNI, no local bank account. He writes about paying, getting paid, and not losing money to the tourist rate.

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