For the complete documentation index, see llms.txt. This page is also available as Markdown.
Verified SMSes
Starting 1 July 2025, each FormSG form with mobile number OTP verification will be allocated 10,000 free SMS OTP verifications. Once this limit is reached, the form will be automatically closed to new responses.
For existing forms with mobile OTP verification enabled, the SMS count will reset to zero on 1 July 2025
Monitor your forms SMS usage directly on FormSG by following the steps below
The Verified SMS feature on the Mobile number field triggers an SMS containing a One-Time Password (OTP) to the entered mobile number, where respondents have to verify before they are able to submit a response.
To enable mobile number OTP verification
Step 1: Add a mobile number field
Step 2: Enable OTP verification
Step 3: Acknowledge the 10,000 free SMS OTP limit for the form
To monitor your form’s SMS OTP usage
Step 1: Click on your Mobile number field
Step 2: Refer to the SMSes used under "OTP verification"
