Wash. Rev. Code § 19.48.030
Whenever the proprietor, keeper, owner, operator, lessee, or manager of any hotel, lodging house or inn shall provide a safe or vault for the safekeeping of any money, bank notes, jewelry, precious stones, ornaments, railroad mileage books or tickets, negotiable securities or other valuable papers, bullion, or other valuable property of small compass belonging to the guests, boarders or lodgers of such hotel, lodging house or inn, and shall notify the guests, boarders or lodgers thereof by posting a notice in three or more public and conspicuous places in the office, elevators, public rooms, elevator lobbies, public corridors, halls or entrances, or in the public parlors of such hotel, lodging house or inn, stating the fact that such safe or vault is provided in which such property may be deposited; and if such guests, boarders or lodgers shall neglect to deliver such property to the person in charge of such office, for deposit in the safe or vault, the proprietor, keeper, owner, operator, lessee or manager, whether individual, partnership or corporation, of such hotel, lodging house or inn shall not be liable for any loss or destruction of any such property, or any damage thereto, sustained by such guests, boarders or lodgers, by negligence of such proprietor, keeper, owner, operator, lessee or manager, or his, her, their or its employees, or by fire, theft, burglary, or any other cause whatsoever; but no proprietor, keeper, owner, operator, lessee or manager of any hotel, lodging house or inn, shall be obliged to receive property on deposit for safekeeping exceeding one thousand dollars in value; and if such guests, boarders or lodgers shall deliver such property to the person in charge of said office for deposit in such safe or vault, said proprietor, keeper, owner, operator, lessee, or manager, shall not be liable for the loss or destruction thereof, or damage thereto, sustained by such guests, boarders or lodgers in any such hotel, lodging house, or inn, exceeding the sum of one thousand dollars, notwithstanding said property may be of greater value, unless by special arrangement in writing with such proprietor, keeper, owner, operator, lessee or manager: PROVIDED, HOWEVER, That in case of such deposit of such property, the proprietor, keeper, owner, operator, lessee or manager of such hotel, lodging house, or inn, shall in no event be liable for loss or destruction thereof, or damage thereto, unless caused by the theft or gross negligence of such proprietor, keeper, owner, operator, lessee, or manager, of his, her, their, or its agents, servants or employees.
RCW 19.48.030