Tax ID Formats by Country

Overview

This guide provides detailed information about the Tax ID formats accepted by the platform for each country and entity type. The system automatically normalizes all Tax IDs to the standard format for each country.

Important: You can send Tax IDs with or without formatting characters (dots, dashes, slashes, spaces). The system will automatically clean and normalize them before validation.

Birth date in tax IDs (rules)

Some tax identifiers embed a birth date; others do not. This matters for rule operators tax_id_age_* (derive age from the field value and compare to a threshold).

Country	Format	Embeds birth date?	Rule operators
MX	RFC persona física (13 chars)	Yes (YYMMDD segment)	`tax_id_age_less_than`, `tax_id_age_greater_than_or_equal`, etc.
MX	CURP (18 chars)	Yes (YYMMDD segment)	Same
MX	RFC persona moral (12 chars)	Incorporation date, not person DOB	Not for person age rules
AR	CUIT/CUIL/DNI	No (DNI is sequential, not DOB)	`tax_id_age_` with `taxIdCountry: AR` — estimated age* from DNI cohort (range midpoint; typical margin ±6–10 years). Does not use `dateOfBirth` or enrichment.
BR	CPF	No	Use `dateOfBirth` or enrichment `age`
CL	RUT persona	No	Use `dateOfBirth` or enrichment `age`
CO / PE	Cédula / DNI	No	Use `dateOfBirth` or enrichment `age`

Applicable fields include taxId, originTaxId, destinationTaxId, userEvent.taxId, userEvent.destinationCuit, and custom paths such as metadata.* when the value is an MX RFC or CURP.

🇧🇷 Brazil (BR)

Person - CPF

Document: CPF (Cadastro de Pessoas Físicas) Accepted digits: 9, 10, or 11 digits

✅ 12345678901    (11 digits)
✅ 1234567890     (10 digits)
✅ 123456789      (9 digits)

✅ 123.456.789-01 (11 digits formatted)
✅ 12.345.678-90  (10 digits formatted)
✅ 1.234.567-89   (9 digits formatted)

Normalization format:

11 digits → XXX.XXX.XXX-XX
10 digits → XX.XXX.XXX-XX
9 digits → X.XXX.XXX-XX

Can I send only numbers without dots or dashes?✅ YES - The system accepts pure numbers and formats them automatically.

Important: As of the latest update (January 2026), the system now accepts CPF with 9, 10, or 11 digits. Previously, only 10 or 11 digits were accepted.

Company - CNPJ

Document: CNPJ (Cadastro Nacional da Pessoa Jurídica) Accepted digits: 13 or 14 digits

✅ 12345678000190  (14 digits)
✅ 1234567000190   (13 digits)

✅ 12.345.678/0001-90 (14 digits formatted)
✅ 1.234.567/0001-90  (13 digits formatted)

Normalization format:

14 digits → XX.XXX.XXX/XXXX-XX
13 digits → X.XXX.XXX/XXXX-XX

Can I send only numbers without dots, slashes, or dashes?✅ YES - The system accepts pure numbers and formats them automatically.

🇦🇷 Argentina (AR)

Person - DNI/CUIL

DNI (Documento Nacional de Identidad)

Accepted digits: 8 digits

✅ 12345678       (8 digits)

✅ 12.345.678     (8 digits formatted)

Normalization format: 8 digits → XX.XXX.XXX

CUIL (Código Único de Identificación Laboral)

Accepted digits: 11 digits

✅ 20123456789    (11 digits)

✅ 20-12345678-9  (11 digits formatted)

Normalization format: 11 digits → XX-XXXXXXXX-X

Can I send only numbers without dots or dashes?✅ YES - The system accepts pure numbers and formats them automatically.

Company - CUIT

Document: CUIT (Clave Única de Identificación Tributaria) Accepted digits: 11 digits

✅ 30123456789    (11 digits)

✅ 30-12345678-9  (11 digits formatted)

Normalization format: 11 digits → XX-XXXXXXXX-X

Can I send only numbers without dashes?✅ YES - The system accepts pure numbers and formats them automatically.

🇲🇽 Mexico (MX)

Person - RFC Persona Física

Document: RFC (Registro Federal de Contribuyentes) Accepted characters: 13 alphanumeric characters

Format Structure

✅ AAAA######XXX
   └─┬─┘└──┬─┘└┬┘
     │    │   └─ 3 characters (homoclave)
     │    └───── 6 numbers (date: YYMMDD)
     └────────── 4 letters (name/surnames)

Example: GOCG850101A12
         └─┬─┘└──┬─┘└┬┘
           │    │   └─ A12 (homoclave)
           │    └───── 850101 (Jan 1, 1985)
           └────────── GOCG (García Ochoa Carlos Gerardo)

Can I send only numbers without letters?❌ NO - RFC requires letters AND numbers in the specific format. You cannot send only numbers.

Company - RFC Persona Moral

Document: RFC (Registro Federal de Contribuyentes) Accepted characters: 12 alphanumeric characters

Format Structure

✅ AAA######XXX
   └┬┘└──┬─┘└┬┘
    │   │   └─ 3 characters (homoclave)
    │   └───── 6 numbers (date: YYMMDD)
    └─────────3 letters (company name)

Example: GOC850101A12
         └┬┘└──┬─┘└┬┘
          │   │   └─ A12 (homoclave)
          │   └───── 850101 (Jan 1, 1985)
          └─────────GOC (García Ochoa Company)

Can I send only numbers without letters?❌ NO - RFC requires letters AND numbers in the specific format.

🇨🇱 Chile (CL)

Person - RUT

Document: RUT (Rol Único Tributario) Accepted digits: 7-8 digits + 1 verification digit

✅ 12345678K     (8 digits + verifier)
✅ 1234567K      (7 digits + verifier)
✅ 123456789     (8 digits + numeric verifier)

✅ 12.345.678-K  (8 digits formatted)
✅ 1.234.567-K   (7 digits formatted)

Normalization format:

8 digits → XX.XXX.XXX-X
7 digits → X.XXX.XXX-X

Important: The verification digit can be a number (0-9) or the letter K (uppercase or lowercase).

Can I send only numbers without dots or dashes?✅ YES - The system accepts pure numbers and formats them automatically.

Company - RUT Empresa

Document: RUT (Rol Único Tributario) Accepted digits: 8-9 digits + 1 verification digit

✅ 123456789K    (9 digits + verifier)
✅ 12345678K     (8 digits + verifier)

✅ 12.345.678-9  (8 digits formatted)
✅ 1.234.567-8   (7 digits formatted)

Normalization format:

8 digits → XX.XXX.XXX-X
7 digits → X.XXX.XXX-X

Can I send only numbers without dots or dashes?✅ YES - The system accepts pure numbers and formats them automatically.

🇨🇴 Colombia (CO)

Person - Cédula/NIT

Document: Cédula de Ciudadanía or NIT Accepted digits: 6-10 digits (variable length)

✅ 1234567890    (10 digits)
✅ 123456789     (9 digits)
✅ 12345678      (8 digits)
✅ 1234567       (7 digits)
✅ 123456        (6 digits)

No special format - Colombian personal IDs don’t have a standard formatting pattern.

Can I send only numbers?✅ YES - The system accepts pure numbers without any special formatting.

Company - NIT

Document: NIT (Número de Identificación Tributaria) Accepted digits: 9 digits + 1 verification digit (10 total)

✅ 1234567890    (10 digits - 9 + verifier)

✅ 123456789-0   (9 digits + verifier with dash)

Normalization format: 10 digits → XXXXXXXXX-X

Can I send only numbers without dashes?✅ YES - The system accepts pure numbers and formats them automatically.

🇵🇪 Peru (PE)

Person - DNI

Document: DNI (Documento Nacional de Identidad) Accepted digits: 8 digits (fixed length)

✅ 12345678      (8 digits)

No special format - Peruvian DNI doesn’t use dots, dashes, or other formatting characters.