A payment card receiver including at least one element defining a payment card receiving slot, a shutter, pivotably mounted with respect to the payment card receiving slot for selectably blocking the payment card receiving slot and a card-operated shutter movement restricting switch operative to retain the shutter in a shutter movement restricting operative orientation, in which the shutter blocks the payment card receiving slot, in the absence of at least partial insertion of a payment card in the payment card receiving slot.