Wash. Admin. Code § 308-56A-315
What document must I submit to change my name shown on the certificate of ownership? You must submit:
(3) A notarized/certified affidavit signed by you stating:
[Statutory Authority: RCW 46.01.110, 46.12.101. WSR 03-12-071, § 308-56A-315, filed 6/3/03, effective 7/4/03; WSR 99-13-150, § 308-56A-315, filed 6/21/99, effective 7/22/99; Order MV 208, § 308-56A-315, filed 7/31/74.]