If Descendant’s Will has already been filed, then the Clerk’s Office will have already opened a file for Descendant and issued a case number for the file. As it happens, however, the file will be classified internally within the Clerk’s Office as a Will Only file and not as a Descendant’s Estate file, although, at least for King County, this is a difference without a distinction.
To file a later Petition for Probate:
The Clerk’s Office will reassign the file from a Will Only file to a Descendant’s Estate file without any further action necessary.
Caution: In King County, if the Will has already been filed, then any Petition for Probate may be heard only in the proper venue of the Will, ie: