To get a copy of a marriage certificate, send in both names and the year they were married. Cost is $3 for a certified copy.
Franklin County Auditor
P.O. Box 1451
Pasco, WA 99301
The Washington State Department of Health, Center for Health Statistics issues certified copies of Birth, Death, Marriage, and Divorce certificates, for events that occurred within the State of Washington. These certificates can be ordered online from VitalChek.