CAEPF

Cadastro de Atividade Econômica da Pessoa Física, the registration of individuals who employ workers (replaced the CEI for them).

Validate

Validates a CAEPF: 14 digits, the 9-digit CPF base of the holder, a 3-digit sequence and 2 check digits. The CAEPF replaced the CEI for individuals who hire employees, such as rural producers.

Both check digits follow the CNPJ modulus 11. Then the resulting pair is shifted by 12, wrapping around 100.
A value whose 12-digit base (the CPF base and the sequence) has all digits the same is rejected.
The value may be a number or a string of 14 digits. Between the printed groups (3, 3, 3, 3 and 2 digits) there may be any run of whitespace, ., - or /, and any of those runs may be left out, so 293118.610/00184 is valid. Whitespace around the value is ignored. Anything else, such as another separator, a letter or a separator inside a group, is rejected.
A number is read only when it is a safe non-negative integer. A negative, fractional, non-finite or unsafe number is invalid.
No official source publishes the check digit rule. Only the 14 positions and the 9-digit CPF base are official (SERPRO's documentation of the Receita Federal cadastro). The IN RFB 1.828/2018 has no check digit, and the eSocial only checks that the number exists in the Receita Federal base. The 3 + 2 split of the last 5 digits and the rule come from third-party reference implementations. They accept SERPRO's example 00000002500171.
A number loses its leading zeros, so a value that starts with 0 is only accepted as a string.

Parameter	Type	Required
`value`	`string \| number`	yes
returns	`boolean`

Check if a CAEPF (Cadastro de Atividade Econômica da Pessoa Física) number is valid. The CAEPF replaced the CEI for individuals who hire employees, such as rural producers.

Layout: 14 digits printed as 000.000.000/000-00: the 9-digit CPF base of the holder, a 3-digit sequence and 2 check digits.
Both check digits follow the CNPJ's modulus 11; the pair is then shifted by 12, wrapping around 100.
A number loses its leading zeros, so a value that starts with 0 is only accepted as a string: isValidCaepf('00000002500171') is true and isValidCaepf(2500171) is false.
Only the 14 positions and the CPF base are official (SERPRO: "9 primeiros números do CPF + número de inscrição resumido" of 5 positions). The split of those 5 into a sequence and 2 check digits, the check digit rule and the shift of 12 come from the community references below; they agree with SERPRO's example 00000002500171.

import { isValidCaepf } from '@brazilian-utils/brazilian-utils';

isValidCaepf('293.118.610/001-84'); // true
isValidCaepf('41142260000101'); // true
isValidCaepf(29311861000184); // true
isValidCaepf(-29311861000184); // false (not a non-negative safe integer)
isValidCaepf('29311861000185'); // false (invalid check digits)
isValidCaepf('00000000000000'); // false (repeated base digits)
isValidCaepf('00000000000012'); // false (repeated base digits)

Source: SERPRO, CAEPF cadastro (14 positions); check digits per ghiorzi.org and brazilian-values.

Code: brazilian-utils/javascript

Try it with JavaScript isValidCaepf

Shared test cases (29) and the result in each library caepf.isValid

The cases, as JSON

Format

Formats a CAEPF with the mask 000.000.000/000-00.

The mask is applied as far as the digits go, so a value being typed is masked progressively, and digits beyond the 14th are dropped. options.pad first left-pads with zeros to 14 digits.
A number is read only when it is a safe non-negative integer. A negative, fractional, non-finite or unsafe number returns an empty string (2.4.0 read the digits of any number, sign and decimal point dropped).
An empty value, or one without digits, returns an empty string even with pad. Until 2.4.0 pad returned the whole zero mask (000.000.000/000-00).

Parameter	Type	Required
`value`	`string \| number`	yes
`options`	`FormatCaepfOptions`	no
`options.pad`	`boolean`	no
returns	`string`

Format a CAEPF (Cadastro de Atividade Econômica da Pessoa Física) number with the usual 000.000.000/000-00 mask.

Same rules as formatCei, with pad (FormatCaepfOptions) padding up to 14 digits (default false).

import { formatCaepf } from '@brazilian-utils/brazilian-utils';

formatCaepf('29311861000184'); // 293.118.610/001-84
formatCaepf(41142260000101); // 411.422.600/001-01
formatCaepf('184', { pad: true }); // 000.000.000/001-84

Code: brazilian-utils/javascript

Try it with JavaScript formatCaepf

Shared test cases (20) and the result in each library caepf.format

The cases, as JSON

Parse

Removes CAEPF formatting and keeps only digits, capped at 14 digits.

A number is read only when it is a safe non-negative integer. A negative, fractional, non-finite or unsafe number returns an empty string (2.4.0 read the digits of any number, sign and decimal point dropped).

Parameter	Type	Required
`value`	`string \| number`	yes
returns	`string`

Remove CAEPF (Cadastro de Atividade Econômica da Pessoa Física) formatting, keep only digits, and cap the result to 14 digits.

import { parseCaepf } from '@brazilian-utils/brazilian-utils';

parseCaepf('293.118.610/001-84'); // '29311861000184'

Code: brazilian-utils/javascript

Try it with JavaScript parseCaepf

Shared test cases (9) and the result in each library caepf.parse

The cases, as JSON

CAEPF

Validate

Format

Parse

Official sources

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