Washington Certification of Formation is a document filed with the Washington Secretary of State that officially creates a business entity in the state of Washington. This document is typically used to form corporations, limited liability companies (LCS), and other business types. The document must include specific information, such as the name of the business, the address of the business, the name of the registered agent, and the purpose of the business. The most common types of Washington Certification of Formation are: 1. Washington Corporation Certificate of Formation 2. Washington Limited Liability Company (LLC) Certificate of Formation 3. Washington Professional Service Corporation Certificate of Formation 4. Washington Nonprofit Corporation Certificate of Formation 5. Washington Cooperative Certificate of Formation 6. Washington General Partnership Certificate of Formation 7. Washington Limited Partnership Certificate of Formation 8. Washington Limited Liability Partnership Certificate of Formation.