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. A) Complete an Affidavit of Support form and; b) Gather evidence of their finances and other supporting documents (See Step 5).Determine the type of visa required to travel to the United States. Learn more about visa types . Submit application form along with all relevant documents in support of your application to any of the offices listed below. Affidavit of Child in Support of Motion for an Order for Sibling Placement or Contact. Some sponsors temporarily reside abroad and intend to move to the US once a family member's immigrant visa is issued. To save time, download and complete the forms you need. -Be physically present in the United States of America. -Possess a valid multiple entry U.S. Visa.