If your household income is insufficient to sponsor an intending immigrant on Form I-864, Affidavit of Support, you may enlist the additional support of a joint sponsor.
A joint sponsor can be any U.S. citizen, lawful permanent resident, or U.S. national who is at least 18 years of age, domiciled in the United States, or its territories or possessions, and willing to be held jointly liable with the petitioner for the support of the intending immigrant. A joint sponsor does not have to be related to the petitioning sponsor or the intending immigrant.
If the first joint sponsor completes Form I-864 for some rather than all the family members, a second qualifying joint sponsor will be required to sponsor the remaining family members. There may be no more than two joint sponsors. A joint sponsor must be able to meet the income requirements for all the persons he or she is sponsoring without combining resources with the petitioning sponsor or a second joint sponsor. Any dependents applying for an immigrant visa or adjustment of status more than six months after immigration of the intending immigrants must be sponsored by the petitioner but may be sponsored by an original joint sponsor or a different joint sponsor.
NOTE: Even if one or more Form I-864s are submitted for an intending immigrant, the petitioning sponsor remains legally accountable for the financial support of the sponsored immigrant along with the joint sponsors. The petitioning sponsor must complete and submit a signed Form I-864 for the intending immigrant even if a joint sponsor will be used. The petitioning sponsor must also provide his or her Federal income tax return for the most recent tax year with supporting tax documents unless otherwise not required to file a Federal income tax return for the most recent tax year.