2-factor authentication (2FA) or one-time passcodes (OTP) are common use cases for toll-free messaging.
Although the type of consent may vary, all business messaging use cases – including 2FA/OTP messaging – requires consent from the end user to send messages. For 2FA/OTP messages, you must have express consent to send a 2FA or OTP text message. Typically, express consent for a 2FA/OTP text message is obtained by informing the user they will receive a 2FA/OTP notification at the phone number they provide, or informing them when they update their phone number in an online profile.
To get your toll-free number verified for a 2FA/OTP use case, you must provide proof of consent. A screenshot or live URL is ideal. If you don't have a screenshot or URL available, then you must provide a thorough, detailed description of how you collect the end user's express consent. 2FA/OTP use cases do not exclude the need to provide proof of consent, and language in T&Cs or Privacy Policy is not sufficient for express consent.
If you need more info on messaging best practices when it comes to consent, please refer to the
Unverified toll-free numbers (TFNs) and Pending Verification toll-free numbers (TFNs) are subject to industry-wide message blocking. Unverified toll-free numbers are TFNs that have not completed the toll-free sender verification process. Pending Verification toll-free numbers are TFNs where a verification request has been submitted, but the request is pending review and approval.
Note: In the past it was possible to send messages from an Unverified TFN or Pending Verification TFN. However, as a result of industry-wide changes, all toll-free numbers, regardless of the use case, must be Verified to originate traffic.
UNVERIFIED toll-free numbers (TFNs) are subject to industry-wide message blocking, effective November 8, 2023.
PENDING VERIFICATION toll-free numbers (TFNs) are subject to industry-wide message blocking, effective January 31, 2024.
All toll-free numbers (TFNs) must be in a VERIFIED state in order to originate traffic.
Unverified TFNs and TFNs pending verification will be blocked with Sinch error code 64 “Blocked due to exceeded quota”. Please see Toll-Free Delivery Report Errors for a full list of Sinch Toll-Free error codes.