# iban

> IBAN structure + ISO 13616 mod-97 checksum. Country-length table NOT enforced — pair with a length check if you need it. Empty values pass.

Source: https://ngwr.dev/reference/validators/iban  
Kind: Validator

## Live demo

Try `GB82 WEST 1234 5698 7654 32` (a textbook valid IBAN).

## Usage

```angular-ts
import { FormControl } from '@angular/forms';
import { WrValidators } from 'ngwr/validators';

const iban = new FormControl('', [WrValidators.iban]);

iban.setValue('GB82 WEST 1234 5698 7654 32'); // → valid (passes mod-97)
```

## Why ngwr provides this

A real ISO 13616 mod-97 checksum, not a length check — and implemented without `BigInt`, so it runs everywhere Angular does.

## API

| Name | Description | Type | Default |
| --- | --- | --- | --- |
| `signature` | Static — drop into a `validators` array. | `ValidatorFn` | `—` |
| `checks` | Structure (2 letters + 2 digits + alphanumerics) and ISO 13616 mod-97. Per-country length tables are **not** enforced. | `—` | `—` |
| `error key` | On failure: `{ iban: true }`. Empty value passes. | `{ iban: true }` | `—` |

## See also

- [wr-input](https://ngwr.dev/reference/components/input) — Host control for account entry.
- [cardNumber](https://ngwr.dev/reference/validators/card-number) — Sibling rule for card payments.