Washington Interpreter Invoice is an invoice used by interpreters in the state of Washington for billing their services. It is typically used for billing of services related to language interpretation, such as sign language, spoken language, or any other type of interpretation service. There are three types of Washington Interpreter Invoice: Standard, Complex, and Specialty. The Standard Invoice includes basic interpreter services such as per-hour billing, travel time, and mileage reimbursement. The Complex Invoice includes more in-depth services such as project fees, hourly rates for multiple languages, and additional fees for special requests. The Specialty Invoice is for services that require special equipment or materials, such as audio-visual equipment or audio-visual recordings. All Washington Interpreter Invoices must include the interpreter's name, address, phone number, e-mail address, tax ID number, and any applicable fees.