If you come to the US on a NON-immigrant (k1) visa you may have the option to stay longer with a i485. If you plan on staying in the US (legally) for longer than your visa allows you will have to do a form I-485, adjustment of status.
Form I-485 is for people in the United States to apply to U.S. Citizenship and Immigration Services (USCIS) to adjust to permanent residence status or register for permanent residence (also known as Green Card).
If you came here on a k1 visa, the green card the USCIS gives you will be a conditional 2 year green card. After 2 years you actually have to file an i751 to remove those conditions.
The i751 is a petition to remove the conditions of the 2 year green card which will make it a 10 year green card. It is “for a conditional resident who obtained status through marriage to apply to remove the conditions on his or her residence. requires evidence”. This document requires lots of evidence to show that you were in a real marriage.
Over the years we have been collecting that evidence. So far what we have is:
– Travel documents (itinerary, tickets, photos with landmarks, receipts)
– tax documents filing joint
– bills with both of our names
– health insurance (with both names)
– car insurance (with both names)
These documents show that we live in the same place for years and have joint interests together.
for more on the i751, check out this site https://www.uscis.gov/i-751