RCW 68.36.020

Cemetery management shall place a suitable notice on each unoccupied space, setting forth the date the notice is placed and that the unoccupied space is subject to forfeiture and sale by the cemetery. If the owner of the unoccupied space fails during the next three years following the date of the notice to maintain or care for the unoccupied space, the cemetery may reclaim the unoccupied space. However, such a notice cannot be placed on the unoccupied space in any cemetery lot until twenty years have elapsed since the last interment in any such lot of a member of the immediate family of the record owner.