RCW 79.15.130: Bill of sale.

When valuable materials are sold separately from the land and the purchase price is paid in full, the department shall prepare a bill of sale. The bill of sale shall:

(1) State the time period for removing the material;

(2) Be signed by the commissioner and attested by the seal of the commissioner's office upon full payment of the purchase price and fees;

(3) Be issued to the purchaser upon payment of the fee for the bill of sale; and

(4) Be recorded in the department.