At Hatfield today, I noticed a TVM with a sticker stating that it might give vouchers instead of change.
Given the discussions elsewhere about stations without ticketing facilities, or only taking cards, could this be a solution? Accepting cash (which is dropped to a safe and secure cash box) but not giving any change - and thus not having to keep a hopper filled up with coins in a more vulnerable position.

I assume from the 'may' bit that when it runs out change it will give vouchers, instead of requiring exact money only (which might be a good thing) but surely this could work at other stations?
Given the discussions elsewhere about stations without ticketing facilities, or only taking cards, could this be a solution? Accepting cash (which is dropped to a safe and secure cash box) but not giving any change - and thus not having to keep a hopper filled up with coins in a more vulnerable position.

I assume from the 'may' bit that when it runs out change it will give vouchers, instead of requiring exact money only (which might be a good thing) but surely this could work at other stations?