Wash. Rev. Code § 24.06.080
The shares of a corporation shall be represented by certificates signed by the president or vice president and the secretary or an assistant secretary of the corporation, and may be sealed with the seal of the corporation or a facsimile thereof. The signatures of the president or vice president and the secretary or assistant secretary upon a certificate may be facsimiles if the certificate is countersigned by a transfer agent, or registered by a registrar, other than the corporation itself or an employee of the corporation. In case any officer who has signed or whose facsimile signature has been placed upon such certificate shall have ceased to be such officer before such certificate is issued, it may be issued by the corporation with the same effect as if he or she were such officer at the date of its issue.
Every certificate representing shares issued by a corporation which is authorized to issue shares of more than one class shall set forth upon the face or back of the certificate, or shall state that the corporation will furnish to any shareholder upon request and without charge, a full statement of the designations, preferences, limitations, and relative rights of the shares of each class authorized to be issued and, if the corporation is authorized to issue any preferred or special class in series, the variations in the relative rights and preferences between the shares of each such series so far as the same have been fixed and determined and the authority of the board of directors to fix and determine the relative rights and preferences of subsequent series.
Each certificate representing shares shall state upon the face thereof:
No certificate shall be issued for any share until such share is fully paid.
RCW 24.06.080