What CP 575 is
The notice the IRS issues when it assigns an EIN, showing the exact legal name tied to the number. Issued once; a business that has lost it requests a Letter 147C instead.
The deadline
None. It's a reference document.
What to do
Use the legal name on it for line 1 of the W-9; payers can ask for a copy when a new vendor's name and EIN don't match.
What the CP 575 shows, and why payers ask for it
The CP 575 is the only document the IRS issues at the moment an EIN is assigned. It carries the legal name exactly as the IRS entered it, the EIN, the address of record, the forms the IRS expects the entity to file (Form 1120, 1065, 941, 945 and so on), and, on the tear-off stub, the four-character name control the IRS will use to match every return filed under that number. That last item is why it matters for 1099 reporting: a TIN match or a filed 1099 succeeds or fails on the name control, not on the full name, so the CP 575 is the one piece of paper that settles what the IRS thinks the vendor is called.
It is issued once. An entity that applied online received it as a PDF at the end of the session; one that applied by fax got it in about four business days; by mail, about four weeks. The IRS does not reissue a CP 575. A business that has lost it calls the Business and Specialty Tax Line and asks for a Letter 147C, which states the same name and number and is accepted everywhere a CP 575 is.
When a vendor sends you one
Banks, payment processors, marketplaces and 10DLC campaign registries ask for a CP 575 or 147C as proof of the EIN-to-name pairing, and a payer whose new vendor fails TIN matching can ask for the same thing. Read line 1 of the vendor's W-9 against the name on the notice. A disregarded single-member LLC is the usual mismatch: the IRS may hold the LLC's own EIN under the LLC name while the W-9 instructions tell the owner to put their own name on line 1 and the LLC name on line 2, and the pairing the vendor "proves" with a CP 575 is not the one the IRS matches against. The LLC and sole proprietor guide walks through which name and number belong together in each case.
A CP 575 is also dated. If the vendor's legal name changed after the date on it (a conversion, a merger, a rebrand filed with the state), the notice is stale and only a current Letter 147C shows the name the IRS holds now.
Questions about CP 575
Who receives CP 575?
Payee (business). The notice the IRS issues when it assigns an EIN, showing the exact legal name tied to the number.
What is the deadline on CP 575?
None. It's a reference document.
What should I do when CP 575 arrives?
Use the legal name on it for line 1 of the W-9; payers can ask for a copy when a new vendor's name and EIN don't match.
Is CP 575 about my own income tax?
No. This decoder covers information reporting and withholding: the notices a payer, filer or payee sees because of Forms 1099, W-2, 945 and the TINs on them. Individual income-tax notices follow a different track.
Have a different notice? The IRS notice decoder lists all 77 in the order they tend to arrive.