Understanding your CP01S notice

What this notice is about

We received your identity theft claim. We'll send any refund you may be due after we finish working on your claim.


What you need to know

  • You can request an Identity Protection Personal Identification Number (IP PIN) for added account protection by creating an account online.
  • Learn how to protect yourself from identity theft and report it to law enforcement, credit bureaus, and financial institutions.
  • Visit our Identity Theft Central to learn more about reporting identity theft to law enforcement.  You can also find information on protecting yourself, and keeping your personal information safe, including your children’s taxpayer identification numbers, identity documents, benefits, and other identity information.

Frequently asked questions

Tips for next year

  • File your tax return on time. If you can’t file on time, e-file Form 4868 to request an automatic extension of time to file. An extension to file a tax return doesn’t extend the time you have to pay.
  • Pay any taxes you owe by the due date to avoid interest and penalties, or explore alternate options like a payment plan if you can’t pay in full.
  • Learn more about how to get an identity protection PIN (IP PIN).

Need help?