# Certn API Documentation

> Source: https://centric-api-docs.certn.co/#check-SECURITY_INDUSTRY_AUTHORITY_1

### UK Security Industry Authority (SIA)

**UK Security Industry Authority (SIA)**

**Identifier:** `SECURITY_INDUSTRY_AUTHORITY_1`

The Security Industry Authority (SIA) Register Check confirms whether an individual holds a valid licence to work in the private security industry in the UK by verifying their licence status with the SIA, and provides visibility into licence type, current status, and expiry date, helping organizations ensure that candidates are legally authorized to carry out regulated security activities before hiring or deployment.

### Response

**201 Created** — Successfully ordered. Use the returned `id` to retrieve the full case via `GET /api/public/cases/{id}/`.

### Error codes

| Status | Type | Description |
|--------|------|-------------|
| 400 | `validation_error` | Invalid request data |
| 401 | `client_error` | Authentication failed |
| 403 | `client_error` | Permission denied |
| 422 | `validation_error` | Request validation failed (e.g. missing required fields) |