LLPIN

Validates an LLP Identification Number (LLPIN): the 7-character code the Registrar of Companies (MCA) allots to every Limited Liability Partnership at incorporation. It is 3 letters (the registration series) + 4 digits (the serial), usually written with a hyphen: AAA-1234.

Rules

Rule	Detail
Format	`^[A-Z]{3}[0-9]{4}$` (7 alphanumeric characters)
Display form	`AAA-1234` — the hyphen is a separator and is accepted even in strict mode
Length	Exactly 7 characters ignoring the hyphen
Checksum	None — format only, no public checksum

Usage

import { validateLlpin } from 'indycheck';

validateLlpin('AAA-1234');
// { ok: true, code: 'VALID', normalized: 'AAA1234',
//   parsed: { llpin: 'AAA1234' } }

validateLlpin('AAA1234'); // ok: true — hyphen is optional

from indycheck import validate_llpin

r = validate_llpin("AAA-1234")
print(r.parsed["llpin"])  # AAA1234

use indycheck::validate_llpin;

let r = validate_llpin("AAA-1234");
assert!(r.ok);

Examples

Input	Result	Code
`AAA-1234`	Valid	`VALID`
`AAA1234`	Valid (same number)	`VALID`
`AAB-5678`	Valid	`VALID`
`aaa-1234`	Valid (normalised)	`VALID`
`AA12345`	Invalid — 2 letters + 5 digits	`INVALID_FORMAT`
`AAAA1234`	Invalid — 8 characters	`INVALID_LENGTH`
`AAA-123`	Invalid — 6 characters	`INVALID_LENGTH`
(empty)	Invalid	`EMPTY`

Error codes

Code	Means
`EMPTY`	Nothing was passed in
`INVALID_LENGTH`	Not 7 characters (ignoring the hyphen)
`INVALID_FORMAT`	Doesn’t match 3 letters + 4 digits

Parsed output

On success, parsed contains:

{ "llpin": "AAA1234" }

Store normalized (AAA1234) in your database and use the AAA-1234 display form (via formatLlpin / format_value) when showing it to users.