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“Duplicate Notice Was Mailed”on your N-600 · Proof of citizenship through parents

USCIS mailed a copy of a notice for your N-600.
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WHICH STEP ARE YOU ON?
Receipt notice
Review by an officer
Interview (if needed)
Decision
Certificate mailed or handed over

What to do, in 3 steps

Watch your mail for the duplicate notice.
Read it to see which original notice it replaces.
Keep it with your case papers.
12months
11 to 12 monthsTypical time for a complete N-600. USCIS published times. Typical ranges, never an exact date.
In this statusThe duplicate notice usually arrives within a few weeks.

What it means for your N-600

USCIS mailed a copy of a notice for your N-600. It is a duplicate, not a new decision or a certificate. Compare it with your earlier notices and keep it in your file. Keep the newest copy on top.

In general, on any form:

USCIS mailed a copy of a notice on your case. This often happens after you ask for a duplicate or when the first notice was returned. It does not change your case. Read it to confirm which notice it is.

Avoid these mistakes

Thinking it is a new decision.
Ignoring a deadline that the duplicate notice repeats.

Quick questions

What does "Duplicate Notice Was Mailed" mean on an N-600?

USCIS mailed a copy of a notice for your N-600. It is a duplicate, not a new decision or a certificate. Compare it with your earlier notices and keep it in your file. Keep the newest copy on top.

Why did USCIS send a duplicate notice?

Usually because you asked for one or the original could not be delivered.

Does this change my case?

No. It is a copy of an existing notice.

Does a deadline on the duplicate restart?

Not always. Read the notice and, if unsure, ask an attorney or accredited representative.

How long does an N-600 take?

The typical range published by USCIS is 11 to 12 months. It depends on the office and your case; it is not an exact date.

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Other statuses of your N-600

Case Was Transferred And A New Office Has JurisdictionAdministrativeNotice Explaining USCIS Actions Was MailedAdministrativeExpedite Request ReceivedAdministrativeName Was UpdatedAdministrativeNotice Was Returned To USCIS Because The Post Office Could Not Deliver ItAdministrativeDate of Birth Was UpdatedAdministrativeContinuation Notice Was MailedAdministrativeExpedite Request DeniedAdministrativeCase Was ReceivedIntake

Every status of an N-600 →

This same status on other forms

I-485Green card from inside the U.S.Application to Register Permanent Residence or Adjust StatusI-130Petition for a family memberPetition for Alien RelativeI-765Work permit (EAD)Application for Employment AuthorizationN-400Become a U.S. citizenApplication for NaturalizationI-131Travel permit or reentry permitApplication for Travel Documents, Parole Documents, and Arrival/Departure RecordsI-751Remove conditions on 2-year green cardPetition to Remove Conditions on ResidenceI-90Renew or replace green cardApplication to Replace Permanent Resident CardI-129FK-1 fiancé(e) visa petitionPetition for Alien Fiancé(e)I-140Employment-based green card petitionImmigrant Petition for Alien Workers

AI-assisted explanation based on the official USCIS status, reviewed by CaseAlerta. Not legal advice. Times are typical ranges, never an exact date.