A cassette which is arranged to hold currency notes or other valuable articles and which may be used for transporting currency notes from a bank to an automatic cash dispensing machine. The cassette includes a receptacle for notes, and locking mechanism for locking and unlocking the receptacle. There is provided a tampering indicating mechanism which is arranged to be actuated during an unlocking and locking cycle of operation of the locking mechanism, this indicating mechanism including a latch which is set to a first state when the cassette is loaded with notes. The latch is tripped during an unlocking operation of the locking mechanism, the latch when tripped serving to prevent any further unlocking operation until such time as the latch is reset to its first state.
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