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What is an Employer Identification Number (EIN)?

How to get proof of EIN from the IRS

Updated over 2 years ago

What is an EIN?

An EIN or Employer Identification Number is issued by the IRS to business entities. This 9 digit number is a unique identifier for businesses. We are REQUIRED to have a valid EIN on file for all of our customers.

The 9 digit number outlined below is an example of an EIN.

An EIN is often referred to by other names including:

  • Employer ID Number

  • Employer Identification Number

  • Federal Employer ID Number

  • Federal Employer Identification Number

  • FEIN

  • Federal Tax Number

  • Federal Tax ID Number

  • Federal Tax Identification Number

How to Apply for an EIN

See the below link to file for an EIN:

How to get a copy of an EIN Verification Letter

When you first get an EIN Number, the IRS sends you an EIN Confirmation Letter (CP 575). This is a one-time document that cannot be recreated, so please be sure to save it for future use.

Unfortunately, sometimes people lose the CP 575. In this case, a business can still request an EIN Verification Letter (147C). The only way to request a 147C is to call the IRS at 1-800-829-4933.

The 147C is another way to figure out what your EIN is and is acceptable as a form of proof of your EIN.

Here's what an EIN Confirmation Letter (CP 575) looks like:

Here's what an EIN Verification Letter (147C) looks like:


For more information from the Internal Revenue Service on applying for an EIN or requesting verification letters, please visit their website: IRS.gov

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