# `ADDRESS_LIST_UNAVAILABLE` (HTTP 501): no licensed partner lists addresses for that country

GET /api/v1/address/postcode/{postcode} needs an address-list partner, and none is configured for the country asked about. Nothing is charged.

Listing the addresses at a postcode is the one address answer no open dataset carries: every full list is derived from a postal operator's own address file, and serving it needs a licence. Spaw says so plainly rather than answering an empty list, which would read as "there are no addresses at this postcode".

The rest of the address API does not depend on it. Validating an address, its postcode, its type and its risk signals all work from the datasets Spaw ships and syncs, and are unaffected by this code.

**What to do.** Use POST /api/v1/address to validate an address you already hold. If you need postcode-to-address lookup, write to support@spaw.co with the countries you need it for.

```json
{
    "success": false,
    "error": {
        "code": "ADDRESS_LIST_UNAVAILABLE",
        "message": "Listing the addresses at a postcode needs a licensed address-list partner, and none is configured for GB.",
        "request_id": "req_01m1kgdm4xngzmbmff68g94w0c"
    }
}
```

Reference: https://spaw.co/docs/errors/ADDRESS_LIST_UNAVAILABLE