Definition: An EIN (Employer Identification Number) is a 9-digit federal tax identification number the IRS assigns to businesses and other entities.
Your EIN helps confirm that your business is real. When you register a standard brand, your provider sends your legal name and tax ID to The Campaign Registry. If the two do not line up with IRS records, your brand can come back unverified.
| Provider | Rule |
|---|---|
| Twilio | legal name must match EIN documents exactly (CP 575 or 147C, error 30918); register any DBA with the brand |
| Plivo | company name and EIN must exactly match the tax document, for example "Yourbusiness, Inc." not "Yourbusiness" |
| SignalWire | each brand should have a unique EIN; an unverified brand can appeal with the IRS CP 575 |
| Twilio (toll-free) | business registration number required for new toll-free verifications since Feb 17, 2026, except sole proprietors |
Twilio notes a brand new tax ID can take 30 to 90 days to appear in validation databases.
Reviewers compare your site to your brand record. If your website shows a name that does not connect to your legal name, that can trigger a mismatch rejection. See brand name match.
Related terms: Sole proprietor brand, Brand vetting, TCR
Our sites put your legal name and DBA where reviewers look. See pricing, or check your current site at /check.
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You apply with the IRS, and it is free, so never pay a fee for one. The IRS says an online application gives you the number right away if approved, fax takes about 4 business days, and mail takes about 4 weeks.
Twilio says new tax IDs can take 30 to 90 days to show up in validation databases. If your brand comes back unverified, TCR allows corrections, resubmission, or an appeal with documents.
The CP 575 is the IRS notice that assigns your EIN, and the 147C is an IRS EIN verification letter. Twilio names both as documents your legal business name should match.
Yes, through the sole proprietor option. TCR limits it to individuals and small businesses in the US or Canada that do not have an EIN, and it comes with lower limits.
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