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Letter 4883C· Identity verification

Letter 4883C — Identity verification (phone)

Identity verification by phone: the IRS needs you to call the Taxpayer Protection Program hotline to verify identity for a return filed under your name.
irs.gov primary2026-05-08
Category
Identity verify
Urgency
Date on notice
Response window
see notice
Key form
—

Respond by the date printed on your individual notice.

Why the IRS sent this

Filed return flagged by IRS identity-protection filters; phone-based verification required.

Response window

Notice received
Respond bydate on your notice

The IRS detail page for Letter 4883C does not state a fixed day count. The response-by date is printed on your individual notice — read the date at the top-right corner.

What to do

Required action

Call the Taxpayer Protection Program hotline shown on the letter with the letter, the relevant tax return, prior-year returns, and supporting documents in hand.

Appeal path

Informal — call the IRS

Informal — phone verification with the IRS.

Notes from the primary source

IRS detail page explicitly states NOT to file Form 14039 if you received Letter 4883C. Refunds may take up to nine weeks after verification.

Go deeper

Educational pillars for this notice

Calm-corrective

Only the IRS can resolve your notice

We are not a CPA firm, not a law firm, not an Enrolled Agent firm, and not affiliated with the IRS. We don't accept payments on your behalf, settle your debt, or call the IRS for you. What we do: explain what your notice means, point you to the right IRS form, cite the statute that authorizes the action, and surface the appeal path. Then you call the number on the notice, file the form, or hire a licensed professional.

Related notices

Likely next or sibling codes

Source

Verified against the official IRS detail page on irs.gov/individuals/understanding-your-letter-4883c. Always re-verify against the IRS page before acting.