Letter 5071C: Potential Identity Theft during Original Processing with Online Option
Taxpayer Protection Program notification to a taxpayer to verify their return online (IRS Identity Verification Service) or by phone. Advises taxpayers that a return was received with their name and SSN and that to protect them from identity theft, their identity needs to be verified before processing the return. Taxpayers receiving this letter have the option to authenticate their identity online using the IRS’s Identity Verification Services website or to call the TPP telephone line.
Updated: July 15, 2025