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SMS & Compliance
How to Register for A2P 10DLC (Step by Step)
A practical walkthrough of A2P 10DLC registration: business profile, brand vetting, campaign submission, common rejection reasons, and how to avoid delays.
Quick Answers
What do I need to register for A2P 10DLC?
Your legal business name exactly as registered, EIN (tax ID), business address, website, a contact person, a description of the messages you send with 2–5 realistic samples, and documentation of how customers opt in to receive texts.
Why was my A2P 10DLC registration rejected?
The most common reasons: business name or address doesn't exactly match IRS/state records, the website doesn't clearly relate to the brand, sample messages don't match the declared use case, missing opt-in description, or missing required language like 'Reply STOP to opt out' in marketing samples.
Step-by-step process
- •1. Gather exact legal data: business name, EIN, and address exactly as they appear on IRS documents (CP 575) or state registration.
- •2. Create the brand: submit the business profile through your SMS provider (e.g., Twilio TrustHub). Automatic vetting checks it against official records.
- •3. Define the campaign: choose the use case (customer care, marketing, mixed), write an honest description, and include 2–5 sample messages that look like what you actually send.
- •4. Document opt-in: describe exactly how a customer consents to texts (website form, in-person, keyword) and include opt-out language in samples.
- •5. Attach your numbers to the approved campaign and start sending — throughput limits depend on your brand trust score.
Tips that prevent 90% of rejections
- •Copy the business name character-for-character from your IRS letter — 'LLC' vs 'L.L.C.' mismatches cause failures.
- •Use a live website that clearly shows the brand and a privacy policy mentioning SMS.
- •Make sample messages realistic and include your business name in them.
- •Marketing campaigns must show 'Reply STOP to unsubscribe' (or equivalent) in samples.
- •Never buy a number and blast messages before campaign approval — early filtering damage is hard to undo.