You can't change the name on your license by mail. Washington law requires drivers who want to change the name on their license to apply for a new one at a driver licensing office. You can still request a replacement license by mail and it will show the name currently on your license.
If your driver license is lost or stolen while you're out of Washington State:
Your replacement license:
To learn how to replace your driver license if you're serving in the military outside of Washington State, see Military personnel.