If you received a two-year green card after marriage, you must file the I-751 to remove the conditions to get the permanent ten-year card. This goes for both the spouse and any children who also received conditional residency. Generally, you have a brief 90-day window to file the I-751. Missing the window could lead to being placed in removal proceedings. However, there are some exceptions where the I-751 can be filed early or late—for instance if there is abuse, the marriage has ended, or if there are exceptional reasons why you couldn’t file on time.