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Sinch Toll-Free Sender Verification ensures messages from your toll-free number (TFN) are delivered. TFNs that are not verified are subject to blocking towards US and Canadian carriers.
 
You can find a link to the Toll-Free Verified Sender Form (VSF) in the Sinch customer dashboard on your toll-free number details page.
 
Screenshot 2026-10-06 152313.png

 

While using the link in the customer dashboard is the preferred method to submit a toll-free verification request, you can also complete the form by the following:

 

  1. Log in to the Sinch Dashboard and select your project.
  2. Navigate to the Messaging section, Click the dropdown for “SMS” and select “TFN Verifications”
  3. Click “+ Create New” to launch the TFN Verification Form.

 

Screenshot 2026-10-06 153119.png

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Last update:
‎10-06-2026 12:50 PM
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