Why are my verification tokens not delivered with reason code 11?

SMS Verifications with reason code 11 are rejected because the recipient number is invalid. Our API requires recipient numbers for SMS verifications to be in international format without leading + and 00. What does this mean? This means that a number starts with the country code followed by the national number, without leading zeros.

Example: if your national number would be 08123456789 and the country code is 65, the number would be 658123456789.

The most common reasons of an invalid mobile number are:

If you believe the mobile number is correct and your SMS verification is still rejected with reason code 11, please contact our support.


Video Walkthroughs
Let the Twizo monkey walk you through all of our services and features.

Video Walkthroughs
go to video’s