Washington Contractor's License Bond License Number Change Rider is a legal document that allows a contractor to change their license number without having to issue a new bond. This rider is typically used when a contractor changes their business entity name, changes their address, or when a contractor is applying for a new license and needs to update their license number. The rider must be signed by all parties involved in the bond agreement, including the surety, contractor, and the Washington State Department of Labor and Industries. There are two types of Washington Contractor's License Bond License Number Change Rider: General Contractor Bond Change Rider and Specialty Contractor Bond Change Rider.