EIN verification service

An EIN verification service is a tool or process used to confirm that a business’s Employer Identification Number (EIN) is valid and matches the business name on record.

What it’s used for

• Onboarding vendors or customers
• Tax compliance checks
• Fraud prevention
• KYC / KYB verification
• Accounting and payment processing

Common verification methods

1. IRS letter or EIN documentation review

   • Best for manual verification
   • Checks the official assignment notice or CP 575 letter

2. IRS TIN Matching

   • Used by certain businesses to match a name + TIN combination
   • Typically available to eligible payers, not a general public lookup

3. Secretary of State / business registry checks

   • Confirms the business is registered
   • Doesn’t always verify the EIN itself

4. Third-party EIN verification providers

   • Offer automated checks
   • Often combine registry, tax, and identity data sources

Important limitation

There is no universal public IRS database where anyone can look up an EIN by company name. Most “verification” services are really matching and validation services, not direct IRS lookups.

If you want to build or buy one

Look for features like:

• Name/EIN matching
• Business entity lookup
• Address and entity status verification
• API access
• Audit logs and compliance support

If you want, I can also help with:

• a list of EIN verification vendors,
• how to build an EIN verification API,
• or a sample verification workflow.