Sign and notarize the form. The signatures can be notarized by a notary public or an active-duty commissioned officer. If the officer's signature, rank, and branch of service appear on the document as a notary, no further proof is needed.
Provide at least 1 as proof you've applied for registration outside of Washington:
Letter of request.
Notarized or certified statement of fact, stating you've applied for an out-of-state title or registration.
How a temporary permit can be used
The permit allows you to use the vehicle in Washington while you apply for out-of-state registration. The permit:
Is valid for 45 days
Must be displayed on the vehicle so it's visible from the outside.
Nonresident military personnel are:
Active-duty members of the United States:
Coast Guard (includes personnel living in Washington who are on duty in the Portland),
Members of the National Oceanographic and Atmospheric Agency (NOAA).
Commissioned officers of the public health service.
Members of foreign military organizations assigned to Washington on official duty.