> ## Documentation Index
> Fetch the complete documentation index at: https://docs.usenumero.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Phone Verification

> Verify phone numbers (basic, advanced, and phone + NIN cross-check).

Verify phone numbers.

***

## Phone Basic

Basic phone number verification.

```
POST /api/v1/business/verification/phone-basic
```

**Signature required:** Yes

### Request body

| Field            | Type   | Required | Description                             |
| ---------------- | ------ | -------- | --------------------------------------- |
| `phone`          | string | Yes      | Phone number                            |
| `idempotencyKey` | string | No       | Unique key to prevent duplicate charges |

***

## Phone Advanced

Phone verification with extended data.

```
POST /api/v1/business/verification/phone-advanced
```

### Request body

| Field            | Type   | Required | Description                             |
| ---------------- | ------ | -------- | --------------------------------------- |
| `phone`          | string | Yes      | Phone number                            |
| `idempotencyKey` | string | No       | Unique key to prevent duplicate charges |

***

## Phone + NIN Cross-check

Verify that a phone number and NIN belong to the same person.

```
POST /api/v1/business/verification/phone-nin
```

### Request body

| Field            | Type   | Required | Description                             |
| ---------------- | ------ | -------- | --------------------------------------- |
| `phone`          | string | Yes      | Phone number                            |
| `nin`            | string | Yes      | National Identification Number          |
| `idempotencyKey` | string | No       | Unique key to prevent duplicate charges |

### Request example

```bash theme={null}
curl -X POST "https://api.usenumero.com/numeroaccount/api/v1/business/verification/phone-nin" \
  -H "Content-Type: application/json" \
  -H "X-Numero-Api-Key: your_api_key" \
  -H "X-Numero-Signature: $SIGNATURE" \
  -H "X-Numero-Signature-Version: v2" \
  -d '{
    "phone": "08012345678",
    "nin": "12345678901"
  }'
```