Where to Fax Form 14039 (IRS Identity Theft Affidavit)
You can fax Form 14039 toll-free to 855-807-5720, file it online (the IRS-preferred method), or mail it to Fresno. If you are answering an IRS notice, use the fax number on that notice instead. Confirm and send below.
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Fax numbers and addresses were last verified July 17, 2026. The IRS can change them at any time — always confirm against the official source: IRS.gov — Reporting Identity Theft.
Three ways to file Form 14039 — pick one, not all
Form 14039 can be submitted online, by fax, or by mail, and the IRS asks you to choose just one method. Online is the IRS-preferred route (IRS.gov/dmaf/form/f14039) and is the fastest, but it does not let you attach documents. Faxing to the toll-free number below or mailing to Fresno both work when you want to include attachments or keep a paper trail.
One important exception: if you are filing Form 14039 in response to an IRS notice or letter (Box 2 in Section A), use the fax number or mailing address printed on that notice — not the general number — so your affidavit is matched to the case the IRS already opened.
Fax Form 14039 to the IRS
For a general submission with no IRS notice, fax Form 14039 to the toll-free number below or file online. If you received an IRS notice or letter, use the fax number or address printed on it instead.
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General submission (no IRS notice) — IRS Identity Theft processing
(855) 807-5720
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All Form 14039 fax numbers and mailing addresses
Every destination is listed below so you can confirm yours directly.
General submission (no IRS notice) — IRS Identity Theft processing
Fax number
(855) 807-5720
Phone option: (800) 908-4490
Mailing address (alternative)
Department of the TreasuryInternal Revenue ServiceFresno, CA 93725Choose ONE method: online (preferred) at IRS.gov/dmaf/form/f14039, this toll-free fax number, or the mailing address. Always include a cover sheet marked "Confidential." The IRS Identity Protection Specialized Unit can be reached at 800-908-4490.
If you are responding to an IRS notice or letter
Fax number
From your IRS notice or letter
If you checked Box 2 in Section A of Form 14039 because you are replying to an IRS notice or letter, and that notice shows a fax number, send it there instead. If the notice shows no fax number, follow the mailing instructions on the notice.
What Form 14039 is and when to file it
Form 14039, "Identity Theft Affidavit," is how you alert the IRS that you are a victim — or possible victim — of tax-related identity theft, so the IRS can place a marker on your account and protect your future filings. You would file it in situations such as: your e-filed return was rejected because a return was already filed using your Social Security number; a dependent’s SSN or ITIN was used on someone else’s return; you received IRS notices about income from an employer you never worked for; or you got mail about a fraudulent tax account opened in your name.
It is just as important to know when not to file Form 14039. The IRS says that in most cases taxpayers do not need to complete it. If you received an identity-verification letter such as 5071C, 4883C, or 5747C, you should follow the instructions in that letter (usually verifying your identity online or by phone) rather than filing a 14039. And if your identity theft is not tax-related — a stolen credit card, a fraudulent loan — you report that to the Federal Trade Commission at IdentityTheft.gov, not to the IRS on Form 14039.
The three submission methods
The IRS gives you three ways to submit Form 14039 and asks you to pick only one. The preferred method is online, through the IRS digital form at IRS.gov/dmaf/form/f14039; it is fast, but note that you cannot attach supporting documents when you file online. The second method is fax: send the completed, signed form toll-free to 855-807-5720, always with a cover sheet marked "Confidential." The third is mail: send it to the Department of the Treasury, Internal Revenue Service, Fresno, CA 93725.
If you are unable to e-file your tax return because your (or your spouse’s or dependent’s) SSN or ITIN was misused, the IRS instructs you to attach the paper Form 14039 to the back of your paper return and mail it to the location where you normally file — not to the Fresno address or the general fax number. And if you are filing the affidavit because of an IRS notice or letter, return it to the fax number or address shown on that correspondence. Choosing the right channel for your situation keeps the affidavit attached to the correct case.
What to include and how to fill it out
Complete every required field: your name, current mailing address, taxpayer identification number, and the tax year(s) you believe were affected. In the explanation area, describe what happened — how you learned of the identity theft, how it affects your tax account, and the relevant dates. Sign and date the form; an unsigned affidavit cannot be processed. If you are submitting on behalf of a dependent or another person, complete the appropriate sections identifying both yourself and the victim.
When you fax or mail (rather than file online), you can include clear photocopies of supporting documentation, and the IRS recommends attaching a copy of a government-issued photo ID and, if applicable, the police report or FTC identity-theft report. Never send your only originals. Because the affidavit contains sensitive personal information, mark your fax cover sheet "Confidential" and keep a complete copy of everything you send.
The IP PIN and what happens next
Whether or not you have been a victim, the single most effective protection against tax-related identity theft is the Identity Protection PIN (IP PIN) — a six-digit number the IRS assigns that must appear on your return for it to be accepted. The IRS encourages everyone to opt in to the IP PIN program at IRS.gov/ippin; if you cannot verify online, you may be able to request one by mailing or faxing Form 15227. An IP PIN blocks anyone else from e-filing a return using your SSN.
After you submit Form 14039, the IRS reviews it and places an identity-theft indicator on your account, which triggers additional protections on future returns. If a fraudulent return caused a problem with your account, the IRS works to resolve it — this can take time, and complex cases can run several months. You can reach the IRS Identity Protection Specialized Unit at 800-908-4490 for status updates or specialized help. Keep your copy of the affidavit and your submission confirmation until the matter is fully resolved.
What to include when you fax Form 14039
- A cover sheet marked "Confidential," with your name, a callback number, and the page count.
- A completed, signed Form 14039 with your TIN, current address, and the affected tax year(s).
- A clear explanation of the identity theft — what happened, how it affects your account, and the dates.
- A photocopy of a government-issued photo ID, and a police report or FTC identity-theft report if you have one.
- For a dependent or another person, the sections identifying both you and the victim.
Common mistakes that get Form 14039 rejected or delayed
- Filing Form 14039 when you actually received a 5071C, 4883C, or 5747C letter — those you answer by following the letter’s verification steps, not by filing an affidavit.
- Using the general fax number when you are responding to an IRS notice that has its own fax number.
- Submitting by more than one method (online AND fax AND mail), which can create duplicate cases.
- Faxing without a cover sheet marked "Confidential," or sending original documents instead of copies.
- Leaving the form unsigned, or omitting the affected tax year(s) and explanation.
- Reporting non-tax identity theft (credit cards, loans) to the IRS instead of to the FTC at IdentityTheft.gov.
After you fax Form 14039
- Keep your fax transmission confirmation and a full copy of everything you sent.
- The IRS places an identity-theft marker on your account and adds protections to your future filings.
- Opt in to the Identity Protection PIN program at IRS.gov/ippin so no one else can e-file using your SSN.
- For status or specialized help, contact the IRS Identity Protection Specialized Unit at 800-908-4490; complex cases can take several months to resolve.
Form 14039 fax FAQ
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Last verified July 17, 2026. Official source: IRS.gov — Reporting Identity Theft