A2P 10DLC guides & resources — verification, samples, opt-in, rejections
Every A2PCheck guide in one place. Each one routes back into the free scanner so you can check your own campaign as you read, not just take notes.
Guidance only — A2PCheck is independent and not affiliated with Twilio, The Campaign Registry, or any carrier, and we can't guarantee approval.
Start here
New to A2P 10DLC, or not sure what carriers actually review? These cover the basics and let you run your campaign through the checker in one click.
- What is A2P verification?Plain-English explainer of the carrier/TCR review that approves a 10DLC campaign — what it checks and how SMS verification differs from voice/call compliance.
- A2P wizardWalk your campaign through the readiness checks step by step and get a Red / Yellow / Green verdict before you submit.
- A2P SMS testingPre-test your description, samples, opt-in flow, and URLs against the checks carriers apply — and fix failures before they cost you a rejection.
- Provider-specific 10DLC checkersPre-check campaigns before submitting through Twilio, Telnyx, Vonage, Plivo, or Bandwidth — same carrier review, different provider flows.
Get the campaign right
The fields carriers scrutinize most, with bad-vs-good examples and copy-paste checklists.
- Sample message checklistWhat the two sample messages you submit must contain — brand, opt-out wording, rate disclosure — with examples that pass and fail.
- Opt-in flow examplesHow to describe consent capture (web form, checkout checkbox, keyword opt-in) so it survives Twilio / TCR review.
- Privacy policy requirementsThe SMS-specific disclosures carriers look for in your privacy policy, including no-sale-of-phone-numbers language.
Rejected? Fix it and resubmit
If Twilio already bounced your campaign, start here to find the cause and clear it before the next attempt.
- A2P 10DLC rejection reason guideMap the rejection language to the right fix: opt-in consent, samples, privacy policy, campaign description, forbidden content, or website mismatch.
- Top rejection reasonsThe most common reasons Twilio rejects A2P 10DLC campaigns and how to recognize each in your own submission.
- How to fix a rejected campaignA step-by-step repair guide: read the rejection reason, fix each field, then pre-scan before resubmitting.
- Resubmission checklistA copy-paste checklist for resubmitting — what to change, what carriers re-review, and how to avoid a second rejection.