I am sponsoring the following family members immigrating at the same time or within six months of the principal immigrant named in Part 3. The applicant must use this affidavit to support their claim of residency or being domiciled in Texas.We also learned the ten steps to formatting an affidavit, which are as follows: Step 1: Decide what the title of your affidavit will be. This article will demystify the Affidavit of Support, breaking down its purpose, requirements, and implications.