PDFWAC 314-55-150
What are the forms of acceptable identification?
(1) Following are the forms of identification that are acceptable to verify a person's age for the purpose of purchasing cannabis:
(a) Driver's license, instruction permit, or identification card of any state, or province of Canada, from a U.S. territory or the District of Columbia, or "identicard" issued by the Washington state department of licensing per RCW 46.20.117;
(b) United States armed forces identification card issued to active duty, reserve, and retired personnel and the personnel's dependents, which may include an embedded, digital signature in lieu of a visible signature;
(c) Passport;
(d) Merchant Marine identification card issued by the United States Coast Guard; and
(e) Enrollment card issued by the governing authority of a federally recognized Indian tribe located in Washington, if the enrollment card incorporates security features comparable to those implemented by the department of licensing for Washington driver's licenses.
(2) The identification document is not acceptable to verify age if expired.