A citizenship application is not improved by sending every document you own. The right evidence depends on the form, the legal basis for the claim, and the facts you disclose. This guide separates baseline items from conditional evidence instead of calling everything “required.”
USCIS's current “What to Expect” guidance identifies these items for the naturalization interview:
USCIS may request additional evidence based on the application and case history.
The old CitizenApproved checklist labeled tax returns, leases, bank statements and other material as generally required. That was too broad. Some of those records are useful or required in particular cases, but the controlling source is the current form instruction plus any request USCIS sends in your case.
For Form N-600 and N-600K, the evidence structure is different again because the claim is based on citizenship through a parent, not ordinary adult naturalization.
Court-certified dispositions, charging/arrest records, sentencing records and proof of completion can be required even when a record was sealed, expunged or otherwise removed. Follow the current N-400 instructions for your exact history.
Evidence of the spouse’s U.S. citizenship, the current marriage, termination of prior marriages, and evidence relevant to the marital-union requirement.
Evidence showing why an absence did not break continuous residence can matter when an absence creates a statutory presumption or break.
Form N-426 and military-service evidence. USCIS publishes a separate military naturalization checklist.
Marriage certificates, divorce decrees, death certificates or court orders as applicable.
Tax transcripts/payment agreements or child/spousal-support records can be relevant when the application asks about those facts or when they bear on eligibility.
Current N-600 instructions require evidence of the citizenship claim, including core civil records and proof of the U.S. citizen parent's citizenship, plus additional documents where marriage, custody, adoption or other facts matter.
USCIS instructions often permit photocopies with a filing but require originals or court-certified copies at interview. Follow the instruction for the exact document rather than a site-wide rule.
Foreign-language documents submitted to USCIS generally require a full English translation with the translator's certification that the translation is complete and accurate and that the translator is competent to translate.
Policy registry review date: 2026-08-29. Educational information, not legal advice.