Washington Articles of Incorporation are legal documents filed with the Washington Secretary of State to form a Washington corporation. The Articles of Incorporation contain information about the business, such as the name of the corporation, its purpose, the address of its registered office, and the names and addresses of the incorporates. They also contain information about the corporate structure, such as the number of authorized shares, the names and addresses of the directors, and the number of directors. Washington Articles of Incorporation must be signed by all incorporates and delivered to the Secretary of State for filing. There are two types of Washington Articles of Incorporation: the Regular Articles of Incorporation and the Professional Service Corporation Articles of Incorporation. The Regular Articles of Incorporation are used to form a regular corporation, while the Professional Service Corporation Articles of Incorporation are used to form a Professional Service Corporation.