The Form I-864 sponsorship agreement remains in force until the sponsored immigrants meet certain conditions: 1. They become a U.S. citizen. 2. They receive credit for 40 quarters of work. 3. They permanently depart the United States and formally abandon their lawful permanent resident status. 4. In a removal proceeding, they lose the lawful permanent resident status obtained through the sponsor's Form I-864. 5. The sponsored immigrant passes away.