How may a person prove their permanent resident duration for N-400 application?

A person can prove their permanent resident duration for the N-400 application by providing their green card and immigration documentation. The green card, officially known as the Permanent Resident Card, serves as the primary evidence of an individual's status as a lawful permanent resident. It includes essential details such as the person's name, photograph, and the date they became a permanent resident, which is crucial for demonstrating the duration of their residency.

Immigration documentation that complements the green card may include any relevant forms or notices received from the United States Citizenship and Immigration Services (USCIS), such as the I-485 approval notice or other official paperwork. Together, these documents establish a clear and verifiable record of the individual’s permanent resident status and duration of residence in the United States, which is necessary for fulfilling the requirements of the N-400 application process.

The other choices do not provide the necessary legal proof of permanent residency. A birth certificate primarily indicates one's origin and age but does not reflect immigration status. A utility bill may show an address but lacks official tie to immigration status. A letter from a family member similarly does not constitute an official document that can validate residency or immigration status.