There are two tiers of WA licenses, regular and enhanced. The enhanced meets US Real ID requirements and can be used to get into Canada.

To get the enhanced 4 years ago, we had to show proof of who we were (think passport or birth certificate) as well as residency. Because the utility bill was in one of our names and not both, we also had to show a marriage certificate.

I don't remember the requirements for the non-enhanced version but it cost less.