# `unsupported_register`: no register is held for that identifier type or country

The identifier type is recognised but this server holds no register that could answer it.

- Appears in: `reason`
- Billing: Free. An identifier no register could answer for never costs a credit.

Company numbers are only unique inside their own register, so a country is required and only the registers installed here can answer. GB is the country covered today.

This is a limit of the data on this server, never a statement about the company.

**What to do.** Use a LEI if the entity has one: those are global and need no country.

```json
{
    "identifier": "12345678",
    "identifier_type": "company_number",
    "found": false,
    "reason": "unsupported_register"
}
```

Reference: https://spaw.co/docs/reasons/unsupported_register