10DLC Brand Rejected for a Tax ID Mismatch? How to Fix It
Most 10DLC brand rejections are about the name, not the messages. If the legal company name does not match the record for the EIN, down to the suffix, the brand fails before any campaign is reviewed, so find the exact legal name first.
Updated October 28, 2026.
Why Brands Fail on the Tax ID
Every business that sends application-to-person texts over a standard 10-digit number has to register a brand with The Campaign Registry through its messaging provider. The brand record includes the legal company name and the EIN, and the two are checked against each other.
Most rejections at this stage come down to one of these:
The DBA instead of the legal name The same problem AP teams see on W-9s, where a DBA ends up in the legal name field. The business submits the name customers know ("Smith Plumbing") instead of the legal name on record for the EIN ("Smith Mechanical Services LLC").
A missing or wrong entity suffix "Acme" and "Acme Inc." are different strings. Leaving off "Inc.", "LLC" or "Corp", or using the wrong one, is enough to fail.
Punctuation and formatting Commas, periods, ampersands and hyphens matter. "A&B Services, LLC" and "A and B Services LLC" will not be treated as the same name.
The wrong EIN for the entity A franchise location submits the parent company's EIN with its own name, or a business that restructured submits an old EIN.
Messaging providers return these as variations of the same message, such as "Tax ID does not match the company name" or a Tax ID data mismatch error. The registrant then has to correct the record and resubmit, which adds days before they can send.
Key takeaways
- The brand record is checked as a pair: legal company name against the EIN. A DBA, a missing suffix or different punctuation fails it.
- The person filling in the form usually has the marketing name, not the formation documents, which is where most mismatches start.
- An EIN lookup returns the legal name on record for the EIN, so you can catch the difference before submitting rather than after a rejection.
- Confirm the exact spelling with the IRS assignment letter or formation documents, then submit once.
| What was submitted | What the EIN is registered to | Why it fails |
|---|---|---|
| Smith Plumbing | Smith Mechanical Services LLC | DBA instead of legal name |
| Acme | Acme Inc. | Missing entity suffix |
| A and B Services LLC | A&B Services, LLC | Punctuation differs |
| Acme Franchise Store 112 (parent EIN) | Acme Corporation | Wrong EIN for the entity |
| Riverside Dental PC (old EIN) | Riverside Dental Group PLLC | EIN belongs to a predecessor entity |
Where the Legal Name Usually Comes From (and Why It's Wrong)
The person filling out the registration form is often a marketing manager, an office administrator, or an agency setting up texting for a client. They rarely have the formation documents or the IRS letter that assigned the EIN. So they type the name on the website, the name on the storefront, or the name in the CRM. Any of those can differ from the legal name.
The authoritative sources are the IRS EIN assignment letter or the company's formation documents. When those aren't at hand, an independent EIN lookup is the fastest way to see which legal name is associated with the EIN being submitted.
How to Check Before You Submit
- Collect the EIN and the name you plan to submit. Get the EIN directly from the business, not from a guess or a public profile.
- Look up the legal name associated with that EIN. An EIN lookup returns the legal name on record for the EIN.
- Compare it with what you were about to submit. If the business gave you a DBA, a shortened name, or a name without its suffix, you'll see the difference immediately.
- Confirm the exact string against the business's own records. Lookup data is aggregated from public and private sources and can be uppercased or reformatted. Use the lookup to catch the mismatch, then confirm the exact spelling and punctuation with the IRS letter or formation documents.
- Make sure the website names the same entity. Brand and campaign reviewers also look at the website. A site that only shows the DBA, or is a parked page, causes its own delays.
Side by Side
| Guessing the Name | Checking the EIN First | |
|---|---|---|
| Name submitted | Whatever is on the website or storefront | The legal name associated with the EIN |
| DBA vs. legal name | Often mixed up | Caught before submission |
| Suffix and punctuation | Frequently wrong | Visible in the lookup result |
| First-pass outcome | Rejection and resubmission | Fewer rejections at the brand step |
| Support load | Tickets after every rejection | Problem caught at intake |
For Messaging Platforms and Agencies
If you register brands on behalf of customers, every rejection is a support ticket and a delay before the customer can send their first message. Building the check into your onboarding form stops most of these before they reach the registry:
- Ask for the EIN at signup
- Look up the legal name on record for that EIN through an API
- Show the customer the legal name on record and ask them to confirm it, or flag a mismatch for review
- Submit the brand with the confirmed legal name
- Do not submit the storefront name, the CRM account name or the website header as the legal name
What a Lookup Does Not Do
An EIN lookup tells you which legal name is associated with an EIN. It does not guarantee brand approval. The registry and the carriers make the final decision, and they also review the brand type, the website, and the campaign itself. Sole proprietors without an EIN register under a different brand type entirely.
IRS TIN Matching is a different tool, meant for payers confirming the TINs of people and businesses they pay. For brand registration, where you aren't paying the business, EIN lookup is the right tool. For more on how the two differ, see EIN Discovery vs. TIN Matching.
How TIN Comply Helps
TIN Comply's EIN & Company Lookup returns the legal name on record for an EIN from an independent database of millions of business records, and ranked candidate EINs when you start from a name. It works in the portal for one-off checks, in bulk (.csv or .xlsx) for existing customer lists, and through the API for onboarding flows. Every lookup is logged with a timestamp and the user who ran it.
Start a free trial and check the legal name before your next brand submission.
Bottom Line
Most 10DLC brand rejections at the Tax ID step come from submitting a name that isn't the legal name on record for the EIN. Look up the legal name first, confirm the exact string with the business, and submit it once.
This article is for informational purposes only and does not constitute legal advice. Brand approval is determined by The Campaign Registry and the wireless carriers.