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CP231 notice: what it means and what to do
Got an IRS CP231 notice? Here is what it means, your deadline, what to check before you answer, and how to reply. Check your own letter free: it stays on your phone.
Check my CP231 notice freeWhat the IRS says this notice is about
Your refund check was returned to us as undeliverable.
What you need to do
Update your address, so we can resend your check by:
- Completing Form 8822-B and uploading it to the Document Upload Tool. To use the tool, visit IRS.gov/DUTReply and enter access code 254b8-568l8, or
- Call us at 800-829-0115
Additional information
Find related resources at:
IRS.gov/F8822B
IRS.gov/AddressChange
IRS.gov/Refunds
Your deadline
Answer by the date printed on your notice. If there is no date, answer as soon as you can, and call the number on the notice if you need more time.
What to check before you answer
Is this letter really from the IRS?
The IRS writes first by mail. A real letter shows a notice or letter number, your name and part of your tax ID number. The IRS does not ask for payment by gift card, crypto or wire transfer. If in doubt, sign in to your IRS online account, where many notices are listed.
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