U.S. wireless carriers require businesses to follow strict compliance guidelines when sending SMS messages using a dedicated number. One of the most critical components of this process is demonstrating that all recipients have provided clear and compliant opt-in consent.
Understand the Opt-In Requirements
To be approved for a dedicated SMS number, you must demonstrate that recipients have given consent to receive your messages. This includes:
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Type of messages the recipient will receive (e.g., alerts, promotions, reminders)
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Disclosure of message and data rates (e.g., “Message and data rates may apply”)
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Message frequency disclosure (e.g., “Message frequency may vary”)
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Opt-out instructions (e.g., “Reply STOP to unsubscribe”)
Opt-in consent is required even if:
- You are only messaging yourself.
- You are sending internal employee messages.
- You are sending only informational or inbound messages.
Submit Required Opt-In Proof
For each opt-in method you use, you must provide a supporting image or document. Submissions must clearly show:
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All four required disclosures listed above.
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The actual interface or process used to capture the opt-in.
- The name of the business, so the end user knows whose opt-in they are agreeing to.
Accepted Submission Examples
| Opt-In Method | Required Submission |
| Website | Screenshot of the form showing disclosures, including the URL. Also note that where a checkbox is used for opt-in, it must be unchecked by default. |
| Text-to-join | Screenshot showing where the number is advertised. |
| Verbal opt-in | The exact script used. |
Important: Screenshots of auto-response SMS messages, internal dashboards, or CRM entries are not sufficient.
Common Mistakes
The following submissions are not compliant:
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Opt-in language hidden in terms of service, privacy policies, or contracts.
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Screenshots of SMS messages confirming that opt-in was completed.
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CRM or software platforms showing manually entered numbers.
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Programming code or system flags indicating opt-in.
- Showing the opt-in language outside of its context. For example, if your opt-in is via a form on your website, but you only show the opt-in section, and not the whole form.
- Providing a website that requires logging in to view. Provide your public-facing business website that describes what your company does instead.
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Justifications for why you believe opt-in isn't required.
Use a Verbal Opt-In Script (If Applicable)
If using a verbal opt-in (e.g., with employees), you must submit the exact script. Here's an approved example:
Example Verbal Opt-In Script
Manager:
“Hi everyone! I want to offer you the option to receive important updates via SMS from [Company Name]. This will include information about meetings, project deadlines, and other key announcements.
Here are some important details:
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Message Frequency: You’ll receive 2-4 messages per month.
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Message and Data Rates: Standard message and data rates may apply from your carrier.
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Opting out: You can opt out at any time by replying “STOP” to the Toll-Free Number.
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Privacy: Your number will be kept confidential and used only for [Company Name] notifications.
If you’d like to opt-in and receive these updates, please say “yes” now and I’ll add your number to the list.”
[Pause for responses.]
“Thank you! I’ll ensure you receive important updates through SMS.”
Final Reminders
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Provide separate opt-in documentation for each opt-in method.
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Promotional and informational content require separate opt-ins. Opt-in for promotional messages also cannot be carried out verbally and requires express written consent.
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Even for test messaging or internal use, a valid opt-in is still required.
Need Help?
If you’re unsure whether your opt-in method meets requirements, we recommend updating your process before submitting the application. For assistance, please contact our support team.