IRS Letter 4883C: Identity verification by phone
Quick answerLike 5071C, but you must call to verify your identity. The IRS flagged the return as possibly filed by someone else.
Letter / notice4883C
MeaningIdentity verification by phone
Action needed?Yes — see steps
What happens next
Refunds are usually released about 9 weeks after successful verification.
Advertisement
What you should do
- Call the number in the letter (not one from a search result)
- Have the letter, the return it mentions and a prior-year return ready
Waiting on your refund? See our estimated IRS refund schedule for 2027 by e-file acceptance week.
Scam check: the IRS first contacts you by mail. Use only the phone numbers printed on your letter or on IRS.gov — never ones from a text, email or unofficial site.
Frequently asked questions
What does IRS Letter 4883C mean?
Like 5071C, but you must call to verify your identity. The IRS flagged the return as possibly filed by someone else.
What should I do?
Call the number in the letter (not one from a search result) Have the letter, the return it mentions and a prior-year return ready
How long does it take?
Refunds are usually released about 9 weeks after successful verification.
Sources
- IRS: Understanding your IRS notice or letter
- IRS: Get Transcript
- Taxpayer Advocate Service (independent help inside the IRS)
Written by the editorial team and checked against the official sources above. See our editorial policy.
By the TranscriptCodes Editorial Team · Last reviewed 2026-11-12.