# Attestation is not an ANI field · Sources and go deeper



## Sources and go deeper

- [Certified Caller](https://www.five9.com/resources/five9_certified_caller). vendor. last checked 2026-10.
- [Default campaign settings](https://documentation.five9.com/bundle/campaign-admin/page/campaign-admin/configuring-campaigns/configuring-dialing-modes/default-campaign-settings.htm). vendor. last checked 2026-10.
- [RFC 8224, Authenticated Identity Management in SIP](https://www.rfc-editor.org/rfc/rfc8224). rfc. last checked 2026-10.
- [ITU-T E.164, international public telecommunication numbering](https://www.itu.int/rec/T-REC-E.164). standard. last checked 2026-10.