The CP 575 G notice is the IRS confirmation letter that tells you a new Employer Identification Number has been assigned to your business. It arrives after you file Form SS-4, and it functions as the official proof that your EIN is real and was issued by the IRS. The letter is sent once, so what you do with it in the first few days matters more than most new business owners realize.
What’s Printed on the Notice
The CP 575 G is a short, structured letter. At the top sits the newly assigned nine-digit EIN, formatted as XX-XXXXXXX. Below the number, the notice shows the full legal name of the entity exactly as you entered it on Line 1 of Form SS-4, along with the mailing address you provided.1Internal Revenue Service. Instructions for Form SS-4 (Rev. December 2025) Future IRS correspondence goes to that address until you change it.
The notice also lists the effective date of the EIN assignment, the entity type (LLC, corporation, partnership, and so on), and the reason you gave for requesting the number, such as “started a new business” or “hired employees.” The IRS uses these fields to route your account to the right filing requirements. An incorrect entity type can land you on the wrong tax return form entirely.
Check Every Field Against Your SS-4
Open the notice the day it arrives and compare each field against your copy of Form SS-4. Read the legal name character by character. A misspelling or a missing word causes return rejections later, and the mismatch gets harder to untangle after you’ve filed anything under the wrong name. Check the entity type, the address, and the effective date too.
If you find an error in the legal name or entity type, call the IRS Business and Specialty Tax Line at 800-829-4933.2Internal Revenue Service. Telephone Assistance Contacts for Business Customers The caller has to be a principal officer listed on the application or an authorized representative. If an accountant or other third party is making the call, the IRS wants a completed Form 2848 (Power of Attorney) or Form 8821 (Tax Information Authorization) on file first.
Have the original Form SS-4 in front of you when you call. The agent will verify your identity, walk through the correction, and start a new CP 575 G reflecting the corrected information. Turnaround for the replacement runs from a few weeks to several months depending on complexity and IRS processing volume. Until the corrected notice arrives, don’t open bank accounts or file returns with the mismatched information. Proceeding anyway is the most common way new businesses end up with IRS account problems in their first year.
Where You’ll Need to Show the Notice
Banks, state agencies, and business partners treat the CP 575 G as the definitive proof that your EIN was legitimately assigned. A verbal confirmation or a screenshot of the online application usually won’t satisfy them.
Commercial banks typically require a copy before they’ll open a business checking or savings account. State revenue departments ask for it when you register for sales tax permits or unemployment insurance. Lenders reviewing a commercial loan application want to see it to verify the business’s federal tax identity. Because the IRS issues only one original CP 575 G per EIN, losing it creates friction every time a third party asks for proof.
Replacing a Lost CP 575 G
The IRS will not reissue the CP 575 G. If yours is gone, what you can get instead is Letter 147C, an EIN verification letter that serves the same practical purpose by confirming the assigned number, legal name, and address.3Internal Revenue Service. Employer Identification Number Most banks and agencies accept it in place of the original notice.
You have two ways to request a 147C:
- By phone: Call the Business and Specialty Tax Line at 800-829-4933, Monday through Friday, 7 a.m. to 7 p.m. local time. Ask for Letter 147C. The agent will verify your identity and can fax the letter during the call. This is the fastest route.3Internal Revenue Service. Employer Identification Number
- By mail: You can write to the IRS requesting the letter, but expect four to six weeks.
If you don’t even know the EIN itself, the IRS suggests checking old tax returns, contacting your bank, or looking at state license applications where you previously provided the number.3Internal Revenue Service. Employer Identification Number You can also request an entity transcript from the IRS, which shows the EIN on file.
If You Received a CP 575 G You Didn’t Request
An unexpected CP 575 G for an EIN you never applied for can be a sign of business identity theft, but not always. Check first whether a spouse, business partner, accountant, or bank requested the number on your behalf for a legitimate purpose, such as setting up a trust or estate.4Internal Revenue Service. If You Received an EIN You Didn’t Request
If you rule out a legitimate explanation, report the identity theft by submitting Form 14039-B (Business Identity Theft Affidavit). You can submit it online through an ID.me account, fax it to 855-807-5720, or mail it to Internal Revenue Service, Ogden, UT 84201. If you already received a separate IRS letter about the fraudulent EIN, use the address or fax number on that letter instead.4Internal Revenue Service. If You Received an EIN You Didn’t Request Don’t ignore the notice. Someone may be using your identity to open accounts or file returns under a fictitious business name.
Keep the Notice Permanently
The CP 575 G is not a document you file once and forget. Keep the original, or a high-quality scan, for as long as the business exists. The IRS requires most business records to be retained for three to seven years depending on the situation, but the CP 575 G sits in a different category.5Internal Revenue Service. How Long Should I Keep Records The EIN is permanent, and banks or government agencies can ask for proof of assignment at any point during the life of the business.
Store the notice in a fireproof safe, a secure digital backup, or both. If your only copy is paper and it’s destroyed, you’ll fall back on the 147C process. Workable, but an avoidable hassle when a scan would have taken a minute.
One last point worth repeating because scam sites blur it: the IRS never charges a fee for an EIN or for the CP 575 G. If a website asked you for payment to “process” the application, it was either a middleman marking up a free service or an outright scam.6Internal Revenue Service. Get an Employer Identification Number The notice itself always comes directly from the IRS at no cost.