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A2P Sole Proprietor Brand Registration
Understand the latest Sole Proprietor registration updates—EIN now required, Canadian 10DLC rules, and added identity verification—while the familiar flow stays intact.
Registering Business Messaging Without Getting Stuck in Verification
Business messaging registration has become more strict as carriers push for verified identities and better compliance across SMS systems.
Sole Proprietor A2P registration now includes additional requirements like EIN validation and identity verification to reduce spam and improve trust.
Without accurate registration details, businesses may run into delays, failed submissions, or messaging restrictions.
This guide will walk you through the updated Sole Proprietor registration process so you can understand the new requirements and avoid common setup issues.
To begin, review the key updates and how they affect new A2P Sole Proprietor registrations.
Key Updates
- EIN required: Businesses must provide an EIN for registration (new registrations without an EIN are not accepted).
- Canadian rules: Canadian 10DLC numbers sending to U.S. recipients must originate from A2P-registered numbers.
- Identity verification: A new security step may include selfie capture and government ID upload.
- Unchanged flow: Form structure and validations remain familiar.
- SHAKEN/STIR benefit: A2P registration may also help with call branding/attestation (where supported), improving answered call rates.
Follow along: Your registration success depends on accurate business details, a valid EIN, and clear messaging compliance (especially opt-out language).
Steps to Register Your A2P Brand
- Prepare: Obtain an EIN (if you don’t already have one) and confirm your business details are accurate.
- Open Trust Center: Go to Settings → Phone Numbers → Trust Center.
- Start Registration: Under A2P Brand and Campaign Registration, click Start Registration.
- Complete details: Enter business name, EIN, email, a direct phone line (OTP-capable), and a valid U.S. or Canadian address.
- Verify & submit: Complete OTP verification, review your details, and submit. Then follow message template requirements for compliance.
Pro tip: Make sure your website (if referenced) includes visible opt-in language and aligns with your brand name and domain used in message samples.
Key Limitations
- New registrations without an EIN are not accepted.
- Opt-out language is mandatory in message templates (example: Reply STOP to opt-out).
- Phone line reuse: One direct phone number can support up to three A2P registrations.
Reminder: If you operate from Canada and message U.S. recipients, ensure those sends route through A2P-registered numbers.
Troubleshooting Common Issues
- Missing EIN: Confirm you’re entering a valid EIN and that your business name matches IRS/EIN records.
- Invalid details: Double-check business name, address, and contact information for typos.
- OTP not received: Use a direct U.S./CA line capable of receiving OTP (avoid shared/virtual lines that can’t verify).
- Template issues: Include opt-out language and keep the samples aligned with your use case.
- Identity verification errors: Re-check image clarity/lighting and make sure your documents are readable.
If issues persist, correct the details and resubmit, or reach out to support for help.
Pro Tips
- Apply for an EIN early (when needed) and keep business records handy for verification.
- Keep your website live with visible opt-in/opt-out language (if you reference website opt-in).
- Ensure at least one sample message includes Reply STOP to opt-out.
- Store your EIN and business docs securely for future audits or resubmissions.
Want compliant messaging that actually delivers?
Get your Brand details right, keep opt-out language in your templates, and maintain a clean website presence to improve approval outcomes.
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Frequently Asked Questions
Why is an EIN required now?
The update reduces spam and improves trust by ensuring only verified businesses can register.
What happens to existing Sole Proprietor registrations?
They remain active for now, but new registrations without an EIN are no longer accepted.
Can one phone number be used for multiple registrations?
Yes. A single phone number can support up to three A2P registrations.
What are the Canadian requirements?
Canadian 10DLC numbers sending to U.S. recipients must be A2P registered. Existing numbers only used within Canada are exempt.
Are Toll-Free numbers affected?
No. Toll-Free numbers are unaffected and continue under existing guidelines.
Register the right way, avoid rework
The new requirements focus on verified business identity. Accurate EIN details, clean consent language, and consistent branding help keep registration smooth.
Better approval. Better deliverability.
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