Quick answer

If your paper refund hasn’t arrived after the normal processing window, request a trace to prompt an IRS investigation. Before filing, check the IRS “Where’s My Refund?” tool and allow the standard processing period—generally 21 days for e-filed returns and up to 12 weeks for paper returns (IRS guidance). If the IRS shows your refund was issued but you didn’t receive it, submit Form 3911 to start a trace. (IRS — Form 3911; IRS — Where’s My Refund?).

How a trace request works

  • Confirm status first: Use the IRS online tool or call the IRS automated refund line to confirm whether a refund was created and mailed. (irs.gov)
  • File Form 3911: This is the IRS “Taxpayer Statement Regarding Refund.” It triggers an inquiry to locate the check or confirm whether it was cashed.
  • Investigation: The IRS coordinates with the U.S. Treasury and the Postal Service as needed to determine the check’s disposition.
  • Outcome: If the check is lost or never cashed, the IRS may stop payment and reissue the refund. If it was cashed fraudulently, you may need to file additional paperwork or a police report.

When to file: timeline and thresholds

  • E-filed returns: Wait at least 21 days from filing before contacting the IRS. If the IRS shows the refund was issued but you haven’t received it, file a trace.
  • Paper returns: Wait up to 12 weeks (IRS processing times vary). If you’re past that window or the IRS confirms a check was mailed to an incorrect or old address, submit Form 3911.
  • If mail problems are suspected: If your local post office indicates a delay or misdelivery, still file a trace after confirming the IRS issued the check.

How to complete and submit Form 3911

  • Download or view instructions on irs.gov for Form 3911. Provide the tax year, type of return, expected refund amount, and your current contact details.
  • Attach copies of any relevant documents (return, IRS notices). If your check was stolen or fraudulently endorsed, keep a record of communications and consider filing a police report.
  • Submission: Follow Form 3911 instructions for mailing or faxing to the appropriate IRS address listed in the form’s instructions.

What the IRS will do and how long it takes

  • Investigation period: The IRS typically investigates and sends a response within about 6–8 weeks after receiving a properly completed Form 3911, though complex cases (stolen funds, offsets, identity verification) can take longer.
  • Possible results: discovery of the mailed check at a postal facility, confirmation the check was cashed, stop-payment and reissue of refund, or instructions for next steps if fraud is suspected.

Common scenarios and remedies

  • Wrong address on file: If the IRS mailed the check to an old address, a trace usually locates the problem and leads to reissue after stop-payment.
  • Lost in the mail: The IRS coordinates with USPS; if the check is unaccounted for, they can reissue.
  • Check cashed by another party: You may need to provide a signed statement and additional documentation; law enforcement involvement can be required for fraud.
  • Offset or applied to debt: If the refund was used to pay federal debt (child support, student loans, tax debt), the IRS will show an offset; a trace cannot recover funds that were legally applied to another debt but can help identify the reason. See how offsets work in more detail in this guide: How Refunds Are Applied When You Owe Other Federal Debts.

Professional tips (from practice)

  • Don’t wait forever: For paper returns, be proactive after 6–12 weeks. In my work with clients, earlier action prevented longer delays when checks were sent to outdated addresses.
  • Document everything: Keep copies of returns, IRS notices, and any postal service communications. Documentation speeds the trace.
  • Use available tools first: Check Tracking Your Refund: Tools, Timelines, and Common Delays and the IRS “Where’s My Refund?” tool before submitting a trace.
  • If electronic refund delays occur: See our advice on e-file refund delays for immediate troubleshooting: What to Do If Your Electronic Refund Is Delayed.

Common mistakes to avoid

  • Waiting too long to act: Delays can make recovery harder if a check was lost or cashed.
  • Assuming reissue is automatic: The IRS must confirm the check’s status; a trace starts that confirmation.
  • Not updating your address: Always file Form 8822 if you’ve moved before filing returns to reduce risk of misdelivered checks.

What to expect after filing a trace

  • Communication: The IRS will send a letter acknowledging receipt and later a letter with the investigation result.
  • Timeframe: Expect updates within several weeks; complex cases may take longer.
  • Next steps: If the IRS confirms a check was cashed by someone else, you may need to complete additional forms and provide identification.

Authoritative sources and further reading

  • IRS — Where’s My Refund? (irs.gov) — official refund tracking tool.
  • IRS — Form 3911, Taxpayer Statement Regarding Refund (irs.gov) — instructions and filing details.
  • Consumer Financial Protection Bureau — guidance on protecting mailed funds and mail fraud (consumerfinance.gov).

Professional disclaimer

This entry is educational and not personalized tax advice. For case-specific guidance, consult a tax professional or contact the IRS directly. Procedures and timelines reflect IRS guidance current as of 2025 but can change; always verify with irs.gov.