Download free printable affidavit online for Washington State. We only deem a sponsor's resources to an alien if the sponsor completed the I-864 or I 864-A.Deeming resources is time limited for state funded benefits. Wait ten days after mailing or delivering the last of the letters. 7. Fill out the blank Small Estates Affidavit in this packet in front of a notary. The only form on this website legally requiring the use of an Affidavit is the Oath of Personal Representative. Affidavit Letter Of Support For Joint Sponsor: Ready-to-use, legally binding, fill-in-the-blanks law firm template with instructions. 1. Talk to the person immigrating to the US. The person for whom you write an affidavit should be someone you know very well. Follow the instructions below to complete Washington affidavit form online quickly and easily. Take advantage of DocHub, the most straightforward editor.