Use this form to show they have adequate means of financial support and are not likely to rely on the US government for financial support. An Affidavit of Support is U.S. Immigration Form I-864.I am sponsoring the following family members immigrating at the same time or within six months of the principal immigrant named in Part 3. OPTIONAL: if you will be providing any support for your family, download the I-134, or Affidavit of Support. Generally, no but it could depend on what the purpose of travel is. For example, if they are coming here for medical treatment etc. The purpose of the Affidavit is to assist consular officers in determining whether a visa applicant will have adequate means of financial support in the US. Note: Mistakes in completing the I-864 are a common reason for delays with an immigrant visa application. By signing this, you agree to financially support a foreign visitor during their stay in the United States. You must also submit an affidavit of support for your parent, referred to as the I-864 form.