Could you please explain the Holder in Due Process law for the state of Washington?

You're going to have to provide some more information. Tell us the situation and then maybe we can tell you how the law applies to you.

"An individual who takes a Commercial Paper for value, in Good Faith, with the belief that it is valid, with no knowledge of any defects.

"The Uniform Commercial Code (UCC) defines a holder in due course as one who takes an instrument for value in good faith absent any notice that it is overdue, has been dishonored, or is subject to any defense against it or claim to it by any other person."

West's Encyclopedia of American Law, edition 2. Copyright 2008 The Gale Group, Inc. All rights reserved.
see: holder in due course legal definition of holder in due course. holder in due course synonyms by the Free Online Law Dictionary. (http://legal-dictionary.thefreedictionary.com/holder+in+due+course)