An Appeal is a written disagreement with an L&I order. The appeal must be sent in writing and sent to the Board of Industrial Insurance Appeals within 60 days of when the order was communicated to you. This written appeal should comply with the requirements of RCW 51.52.070.
L&I will be given an opportunity to review the appeal and reconsider their order. If L&I passes on that oportunity then the Board of Industrial Insurance accepts a proper appeal and the litigation process starts.
Miss your 60 day deadline and you have a problem because the order becomes Res Judicata. If you appeal in time then you will start into the Board of Industrial Insurance Appeals process.
Send a written appeal to: BIIA, P.O. Box 42401, Olympia, WA 98504-2401
Or you can file your appeal online.
Here is what is important Making the appeal on time is most important. After an appeal is made you have some time to gather or get information to support the reasoning you put in the appeal. Said another way: Appeal first and get your information when you can.