147C letter
What is a 147C letter?
A replacement confirmation. If you lose the CP-575 the IRS will not reissue it; it sends a 147C letter instead, which banks accept in the same way.
A 147C is the IRS telling you, again, what EIN it holds for your company. It exists because the original confirmation, CP-575, is printed once and never again — so when a bank asks for proof of your EIN and the original is gone, this is the document that replaces it.
It carries the same information and is treated the same way by banks and payment providers. Unlike the CP-575 it can be requested as often as you need.
Watch out: Keep a scan of whichever letter you hold. Most of the trouble people have with these letters is that the only copy was paper.