A proper affidavit should contain the sponsor's most recent financial records. An affidavit of support, (USCIS Form I-864), is required for all immediate relatives of US citizens and lawful permanent residents.I am providing this affidavit to verify my income as I have no other income documentation available to me. In this video we're going to show you how to complete an i 864 and affidavit of support that is needed as part of the package for an adjustment of status. The individual who signs the affidavit of support becomes the sponsor once the intending immigrant becomes a lawful permanent resident. I certify that the information presented in this letter is true and correct to the best of my knowledge and belief. Sincerely,. In either case, Form I-131 typically must be accompanied by. Forms to Complete Online and Print. Essential Guide to San Diego County Jail Notary Services for Inmates and Families. I certify that the information given in this letter and the copies of financial proof are complete and true.