Type of identity verification program.

[Proto definition ![GitHub](https://developers.google.com/site-assets/logo-github.svg)](https://github.com/googleapis/googleapis/blob/master/google/ads/googleads/v26/enums/identity_verification_program.proto)

| Enums ||
|---|---|
| ## `ADVERTISER_IDENTITY_VERIFICATION` | Advertiser submits documents to verify their identity. |
| ## `UNKNOWN` | The value is unknown in this version. |
| ## `UNSPECIFIED` | Not specified. |