IRS NOTICE REFERENCE
Understanding your CP231 notice
Your refund check was returned to us as undeliverable.
General information only. Not legal or tax advice.
Notice details
- Notice code
- CP231
- Category
- Refund and adjustment
- Severity tier
- Tier 1 — Routine. Informational or administrative notice; no response typically required.
- Governing law
- §6213(b); §6402 (Internal Revenue Code sections)
- Source
- IRS.gov — Understanding Your IRS Notice
What this notice is
Your refund check was returned to us as undeliverable.
Source: IRS.gov. Reproduced for reference. General information — not legal or tax advice.
What the IRS says 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
This is the IRS’s own guidance reproduced from the IRS notice page. It describes the IRS’s process — it is not legal or tax advice from TaxRiskOS.
Official IRS reference
Read the official notice page on IRS.gov: https://www.irs.gov/individuals/understanding-your-cp231-notice
Related tools
TaxRiskOS is workflow software for practitioners — it captures the notice, computes the deadline, surfaces the escalation tier, and builds a document checklist. It documents process; it does not give advice or draft responses.
Check this notice’s deadline (free tool)