Argentina (AR)

Documents

Code	Scope	Length	Check digit	Confidence
AR_DNI	personal	7-8	none	high (format)
AR_CUIL	personal (labor)	11	mod-11	high
AR_CUIT	tax	11	mod-11	high
AR_CDI	tax (alterno)	11	mod-11	high

AR_DNI — Documento Nacional de Identidad

Overview

Personal identity document issued by RENAPER. Has no check digit on its own; validation is length + digits only.

• Issuer: RENAPER — https://www.argentina.gob.ar/dni
• Visual format: 00.000.000 (7-8 digits with thousands separators)
• Legal basis: Ley 17.671

Sources

• RENAPER portal: https://www.argentina.gob.ar/dni

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AR_CUIL — Clave Única de Identificación Laboral

Same algorithm and length as CUIT, but issued by ANSES for labor purposes. Validates with the same mod-11.

• Issuer: ANSES — https://www.anses.gob.ar/
• Visual format: XX-DDDDDDDD-V

Algorithm

See CUIT below — identical.

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AR_CUIT — Clave Única de Identificación Tributaria

Overview

Tax identifier. Issued by AFIP (renamed ARCA — Agencia de Recaudación y Control Aduanero — per Decreto 953/2024). Despite the rebrand, format and algorithm are unchanged.

• Issuer: ARCA (formerly AFIP) — https://www.arca.gob.ar/
• Composition: 2 prefix + 8 base + 1 verifier
  • Prefixes: 20, 23, 24, 25, 26, 27 for personas físicas; 30, 33, 34 for personas jurídicas
• Visual format: XX-DDDDDDDD-V
• Legal basis: RG AFIP 10/1997

Algorithm

mod-11 with weights [5, 4, 3, 2, 7, 6, 5, 4, 3, 2] over the first 10 digits.

sum = sum(digit[i] * weights[i] for i in 0..9)
r   = sum mod 11
dv  = 11 - r

if dv == 11: dv = 0
if dv == 10: number is invalid by convention.
             AFIP issues prefix 23 or 24 instead of 20/27 for these persons
             (RG AFIP 10/97 § 4) and recomputes.
Copy

Sources

• ARCA / AFIP normativa: https://www.arca.gob.ar/
• RG AFIP 10/1997 § 4 (special handling for dv == 10)
• Cross-validated against validator.js and Argentine fintech libraries

Recent reforms

• 2024 — Decreto 953/2024 renames AFIP to ARCA. Format and algorithm unchanged. Old afip.gob.ar URLs continue to work.

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AR_CDI — Clave de Identificación

Overview

Identifier assigned by ARCA (ex-AFIP) to natural persons who do not hold CUIT or CUIL but must appear in tributary operations: extranjeros sin obligación tributaria, sucesiones indivisas, menores, herederos. Same algorithm and length as CUIT/CUIL; only the prefix is different.

• Issuer: ARCA (formerly AFIP) — https://www.arca.gob.ar/
• Composition: 2 prefix + 8 base + 1 verifier
  • Prefix: 50 (asignado por ARCA cuando no hay DNI)
• Visual format: XX-DDDDDDDD-V
• Legal basis: RG AFIP 3995/2017 (CDI assignment); RG AFIP 10/1997 § 4 (DV algorithm reused)

Algorithm

Identical to AR_CUIT — mod-11 with weights [5, 4, 3, 2, 7, 6, 5, 4, 3, 2] over the first 10 digits. The library reuses computeCuitDV from src/countries/ar/shared.ts; the only difference vs CUIT/CUIL is the allowed prefix set ({ "50" }).

Synthetic test vectors

valid:
  - 50-12345678-2
  - 50-11111111-9
  - 50-00000000-8
  - 50-98765432-2
  - 50-50000000-4

invalid (format):
  - "" (empty)
  - 5012345678   (10 digits)
  - 501234567823 (12 digits)
  - 20-12345678-6 (CUIT prefix; correct CUIT DV but rejected as CDI)
  - 30-70123456-8 (CUIT prefix; correct CUIT DV but rejected as CDI)

invalid (checksum):
  - 50-12345678-0
  - 50-11111111-0
  - 50-50000000-5
Copy

Sources

• ARCA / AFIP normativa: https://www.arca.gob.ar/
• RG AFIP 3995/2017 (CDI assignment by ARCA when no CUIT/CUIL is available)
• RG AFIP 10/1997 § 4 (DV algorithm; reused by CDI)
• Cross-reference: python-stdnum.ar.cuit validates CUIT/CUIL/CDI identically (same algorithm). validator.js isTaxID('es-AR') only knows the CUIT prefixes and rejects CDI's 50 prefix; this is a documented divergence (validator.js covers the tax-id subset, not the CDI fallback).

Open questions

None. The 50 prefix is the documented CDI assignment per RG AFIP 3995/2017; algorithm parity with CUIT is reaffirmed in the same regulation.

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AR_PASAPORTE — Pasaporte

Overview

Travel document issued by RENAPER. Legacy issuances used a 9-digit numeric sequential number; post-2012 passports use a pseudo-random alphanumeric of similar length (8-9 chars).

• Issuer: RENAPER — https://www.argentina.gob.ar/renaper
• Composition: 8-9 alphanumeric
• Visual format: contiguous chars

Algorithm

None on the printed number. MRZ check digit lives in algorithms/icao-9303.ts.

Confidence

low — RENAPER has not published the post-2012 alphanumeric format spec.

Sources

• Wikipedia, Argentine passport: https://en.wikipedia.org/wiki/Argentine_passport