The Bottom Line Up Front (BLUF)

If your business sends appointment reminders, missed call replies, or project updates through software like Twilio, GoHighLevel, or CallRail, you must register for Application-to-Person 10-Digit Long Code (A2P 10DLC).

The major US mobile networks (AT&T, Verizon, and T-Mobile) reject more than 70% of first-time registration applications. A single rejection delays your messaging launch by three to four weeks and incurs non-refundable carrier review fees.

Carriers reject applications for tiny errors: a missing “LLC” on your application, a website privacy policy that fails to include mandatory carrier wording, or a web form that does not have an explicit opt-in disclosure.

Why Cellular Carriers Created A2P 10DLC

In years past, anyone could buy a local phone number through an API and blast thousands of spam texts. To stop spam, the major carriers joined together with The Campaign Registry (TCR).

Today, every business that sends automated or software-assisted texts must prove three things:

  1. Legitimate Identity: You are a real legal business with an active IRS tax ID (EIN).
  2. Explicit Consent: Your customers clearly agreed to receive texts from your company.
  3. Consumer Protection: You will never sell or share customer phone numbers with outside lead brokers.

The 5 Most Common Reasons Carriers Reject Businesses

If you want your campaign approved in under 5 business days, avoid these five common traps:

Your legal name on the registration form must match your official IRS CP-575 confirmation letter or Form W-9 character for character.

  • If your IRS letter says Acme Roofing Services LLC, but you type Acme Roofing, the automated system fails you instantly.
  • P.O. Boxes and virtual CMRA mailboxes are automatically flagged. You must submit your physical office or registered agent address.

2. The Missing Mobile Privacy Clause

Carriers manually inspect your website privacy policy. If your policy says “We may share your data with partners and affiliates”, your application will be denied immediately.

Your website privacy policy must contain this exact mandatory clause:

“No mobile information will be shared with third parties or affiliates for marketing or promotional purposes. All the above categories exclude text messaging originator opt-in data and consent; this information will not be shared with any third parties.”

If your website has a contact form or booking calendar, you cannot hide consent inside tiny terms and conditions.

  • You must include an un-checked checkbox or clear disclosure above the submit button.
  • The disclosure must state: “By submitting this form, you consent to receive informational text messages from [Business Name]. Message frequency varies. Message and data rates may apply. Reply STOP to cancel.”

4. Sample Messages Missing Opt-Out Language

When submitting your application, you must provide sample messages that demonstrate how you talk to customers.

  • Every sample promotional or automated message must end with: Reply STOP to unsubscribe, HELP for help.
  • Failing to include STOP in sample messages triggers an immediate rejection.

5. Website Not Yet Live or Under Construction

A human reviewer will open your website URL before approving your brand. If your site returns a 404 error, displays a “Coming Soon” page, or does not clearly state who you are and what services you offer, the reviewer will reject the application.

The 2026 First-Pass Approval Checklist

Before you hit submit in your CRM or telecom console, check off every item on this list:

ItemRequirementVerified?
Legal Entity NameMatches IRS CP-575 document exactly[ ]
Federal EINMatches 9-digit tax ID registered to the exact name[ ]
Physical AddressReal street address (no P.O. Boxes)[ ]
Website Privacy PolicyContains the strict mobile data non-sharing clause[ ]
Website Terms of ServiceLists message frequency and customer care phone number[ ]
Contact Form Opt-inExplicit SMS disclosure above the submit button[ ]
Sample Message 1Conversational prompt with STOP and HELP keywords[ ]
Sample Message 2Appointment confirmation with STOP and HELP keywords[ ]

Taking twenty minutes to format your privacy policy and legal documents correctly saves you weeks of back-and-forth delays with telecom carriers.