Sinch's Toll-Free Verification Form ensures messages from your toll-free number (TFN) have been verified by the carriers for deliverability. TFNs that are not verified are subject to blocking towards US and Canadian carriers.
You can find a link to the Toll-Free Verification Form in the Sinch Build Dashboard on your toll-free number details page in "Your virtual numbers" and click on the number.
Before you start:
- Have the toll-free number ready. It must already be on your Sinch account. If not, buy or host a toll-free number first.
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If you're porting voice and messaging, fill out this this Letter of Authorization (LOA) and Log into the Sinch Support Portal → Submit a request, and select the following:
- Region: US/Canada
- Product information: Numbers & Connectivity
- Numbers: Toll-Free – Voice + Messaging
- Case Type: Number Porting Issue/Request – VOICE AND MESSAGING
- NOTE: Be sure to tell us your Account ID, Project ID and SMS Service API you intend to use when the number ports.
- *Gather the end-business details: legal name, website, registered address, EIN (or the local registration number outside the US), and a main contact.
- Prepare the opt-in evidence: a public URL to an image showing how customers opt in, plus a written description of the process.
- Have the business's privacy policy and terms and conditions URLs ready.
*ISVs and resellers: Enter the end-business's information, not your own. The business is the company actually sending the messages and has their name branded in the message content.
Step 1: Open the Toll-Free Verifications page
- Log in to the Sinch Build Dashboard and select your project.
- Navigate to the Messaging section. Select the TFN Verifications option from the SMS menu.
- The Toll-Free Verifications page is displayed:
Click + Create New to launch the TFN Verification Form.
Step 2: Enter Toll-Free Number
The TFN Verification Form is displayed:
Enter your toll-free number in "Toll-Free number" field. Click Next Step.
Step 3: Business Details
The Business Details page is displayed:
Enter the following details:
- Business name: The company responsible for the content of the messages.
- Business DBA (optional): Only if the public brand name differs from the legal name. It must match what appears on your website and in your production messages.
- Business website: Full website URL. If there is no website, provide another online presence such as a business listing or social media page.
- Registered address:
- Apartment/Unit (optional) and Street Number
- Street and City
- State and Zip/Post Code
- Country: pick from the dropdown (you can scroll or search)
- Business registration number: US businesses enter their EIN, and it should match the business name. Businesses outside the US enter their official local registration number.
- Registration number format: Choose the type that matches your number, such as Employer Identification Number (EIN) for U.S. businesses.
- Business entity type: Choose the legal structure that best describes the business (ex: image uses Public Profit).
- Country where the business is registered: the country that issued the registration number.
- Main business contact: first name, last name, email, and phone.
- Click Next Step.
Step 4: Use case information
The Use case information page is displayed:
Enter the following details:
- Monthly message volume: Select the approximate number of messages you'll send per month through this number.
- Use case: Open the dropdown (you can search) and pick the primary use case, such as 2FA, Appointments, Billing, General Marketing, or Mixed...etc.
- Use case description: Replace the template text with specific detail about the service your messages provide.
- Sample message: Enter a realistic message that customers receive. A good sample includes the business name, message frequency, "Msg & Data rates may apply," and HELP and STOP instructions.
- Privacy policy URL: link to the privacy policy page on the business's website.
- Terms and conditions URL: link to the terms of service page.
- Click Next Step.
Step 5: Opt-in information
The Opt-in information page is displayed:
Read the opt-in requirements at the top of the page. Carriers require evidence that people consented to receive your messages. Consent language buried in Terms & Conditions or a Privacy Policy is not considered a compliant opt-in.
Take the following steps:
- Scroll down and check Yes to confirm you've read and understood the requirements.
- How do customers opt in? Select every method that applies, such as Website…etc.
- Opt-in image URL: Paste the URL of an image that shows the opt-in flow, for example the sign-up page with the consent checkbox. Use Add image URL to add more images.
- Opt-in process description: Explain how customers opt in. Must be specific – not “through the website”, or “over the phone”.
- Click Next Step.
Step 6: Review & Submit
The Review & submit page is displayed:
Review every section: Toll-Free number, Business Details, Use case, and Opt-in. If you need to make any changes click the Edit button next to any section .
Once you are satisfied all the information is correct, click Create TFN Validation.
Step 7: Check the status
After submitting, you will return to the Toll-Free Verifications list with your submission marked as Waiting. Click the submission ID to review your submitted details.
Your submission will have one the following statuses:
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Waiting: Sinch will review your application.
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In Progress: Sinch will move forward your compliant submissions for carrier review/approval.
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Verified: Once approved by the carrier, the status changes to Verified, and your TFN is active for messaging.
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Rejected: If the submission is non-compliant, the status changes to Rejected. The submitter will receive an email notification detailing the rejection reasons.
