You can obtain a Green Card by marrying a U.S. citizen, but you must prove that marriage is a true marriage, one in which you love each other and share your lives together. The marriage must not be a financial arrangement or one that was entered into just to receive an immigration benefit. It must also be a legal marriage, where both parties are free to marry. The marriage for Green Card process differs, depending on if you marry in the U.S. or marry abroad. Currently, all marriages are subject to the grant of a two-year conditional residency. The conditional Green Card is valid for a two-year period, and will need to be converted to a permanent Green Card during this time. Couples fill out an I-751 form to request this conversion. To begin the marriage for Green Card process, fill out an application form, and attend an interview at a local US Immigration Office. Approval of a conditional Green Card is usually awarded at the conclusion of the interview.