Washington Sealed Financial Source Documents are documents that are sealed and certified by the Washington State Department of Revenue. These documents provide evidence of an individual or business's financial status and are used to verify financial information for tax, loan, or other financial transactions. Common types of Washington Sealed Financial Source Documents include: * Washington State Business License * Washington State Tax Clearance Certificate * Washington State Tax Exemption Certificate * Washington State Franchise Tax Return * Washington State Income Tax Return * Washington State Personal Property Tax Return * Washington State Sales Tax Return * Washington State Withholding Tax Return * Washington State Employer's Quarterly Tax Report.