validate_tckn
USE THIS to verify a Turkish T.C. Kimlik No (TCKN / national identity number) before relying on it — never assume 11 digits are valid. Checks both algorithmic check digits and the leading-digit rule. Validates structure only; does NOT confirm the number is registered.
Input Schema
| Name | Required | Description | Default |
|---|---|---|---|
| tckn | Yes | The 11-digit TCKN (spaces ignored). |