(26)It is necessary to specify and clarify the UCITS depositary’s liability in case of the loss of a financial instrument that is held in custody. The depositary should be liable, where a financial instrument held in custody has been lost, to return a financial instrument of an identical type or the corresponding amount to the UCITS. No discharge of liability in the case of loss of assets should be envisaged, except where the depositary is able to prove that the loss is due to an external event beyond its reasonable control, the consequences of which would have been unavoidable despite all reasonable efforts to the contrary. In that context, a depositary should not be able to rely on internal situations such as a fraudulent act by an employee to discharge itself of liability.