Twilio returns No-TN-Validation when the SHAKEN PASSporT is malformed, carries invalid phone numbers or has a timestamp more than one minute old.
Checked 2026-09-30
- Vendor
- Twilio
- Product
- Programmable Voice
- Subsystem
- SHAKEN verification
- Deployment
- multi-tenant
- Region
- us
- Release range
- current as of 2026-09-30
- Checked
- 2026-09-30
Sources
- Trusted Calling with SHAKEN/STIR — Twilio · tier 2 current vendor documentation · StirVerstat values list
Cite this note
APA
WarmTransfer. (2026, September 30). Caller authentication and fraud prevention in contact centers: source note contact-center-caller-authentication-twilio-no-tn-validation. WarmTransfer. https://warmtransfer.net/knowledge/claims/contact-center-caller-authentication-twilio-no-tn-validation
BibTeX
@misc{warmtransfer-claim-contact-center-caller-authentication-twilio-no-tn-validation,
title = {Caller authentication and fraud prevention in contact centers: source note contact-center-caller-authentication-twilio-no-tn-validation},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/contact-center-caller-authentication-twilio-no-tn-validation},
note = {Source note contact-center-caller-authentication-twilio-no-tn-validation, checked 2026-09-30}
}