Washington Self Insured Employer Certificate of Excess Insurance is a type of insurance coverage that is offered to employers in the state of Washington. This type of insurance provides employers with additional protection beyond the state-mandated minimum coverage. It covers the employer for any additional liability costs associated with injuries or illnesses that occur in the workplace. This type of insurance is also known as "excess liability insurance," and it is designed to protect employers from financial losses that arise from employee injuries or illnesses. There are two types of Washington Self Insured Employer Certificate of Excess Insurance: General Liability and Professional Liability. General Liability covers the employer for any general liability claims that are brought against them by employees or third parties. Professional Liability covers the employer for any professional negligence claims that are brought against them by employees or third parties.