In cases where damage or loss of library material occurs, the patron will be assessed the replacement cost. In other instances where library-media materials are retained by the borrower beyond the designated due date, fines will be levied as a sanction to effect the prompt return of items which may be in demand by others. When materials are not returned, or fines not paid, holds are placed on the borrowing privileges of those involved. When expensive or valuable items are involved and reasonable attempts to advise and notify the debtor have been made, outstanding fines and fees may be assigned to a collection agency (RCW 19.16.500).