Who is the will being proven to?

The will is generally being proven to be valid to the Superior Court in the county in which the Decedent resided at death.  Accordingly, probate cases are filed in the county where the deceased person resided or owned real estate. Some counties have a main courthouse and several smaller branches. Check the county’s rules to see whether or not you have the option of filing at a branch courthouse.

Sources

1.      http://www.nolo.com/legal-encyclopedia/probate-faq-29135.html

2.      http://www.americanbar.org/groups/real_property_trust_estate/resources/estate_planning/the_probate_process.html

3.      http://www.wa-probate.com/Instructions/Probate-FAQ.htm#Whats%20the%20probate%20process,%20simply%20&%20generally

4.      http://statelaws.findlaw.com/washington-law/washington-probate-laws.html

5.      http://www.nolo.com/legal-encyclopedia/washington-probate-an-overview.html

6.      http://estate.findlaw.com/probate/the-probate-basics.html