Civil Code, Art. 1981

When the thing deposited is delivered closed and sealed, the depositary must return it in the same condition, and he shall be liable for damages should the seal or lock be broken through his fault. Fault on the part of the depositary is presumed, unless there is proof to the contrary. As regards the value of the thing deposited, the statement of the depositor shall be accepted, when the forcible opening is imputable to the depositary, should there be no proof to the contrary. However, the courts may pass upon the credibility of the depositor with respect to the value claimed by him. When the seal or lock is broken, with or without the depositary's fault, he shall keep the secret of the deposit. (1769a)