Hi only just seen this.... dp is s bus driver for stagecoach and in the mornings no most drivers won't give out that much change as leaves them short for rest of the day ( and they have to go to the bank to get more change can't get from the depot ) dp gives out change vouchers which you can use to get your change from another stagecoach bus or from the shop ( if they have a stagecoach ticket shop ).
But it says on it how much is due back to the customer.
I would go down to the depot and speak to the staff all buses here are covered by cctv so won't be hard to find him on it if you give time and date.
Drivers pay in at the end of shifts so all money us accounted for. Go down there and can be easily sorted out. Driver should know better that has to have in it how much is due back or what you paid with.
It's not just your son that couldn't be bothered to get change, dp other week first thing in the morning on a Monday and 16 people tried to give 20 pound notes for 2 pound summit . All admitted didn't get change as can get on bus.
So he gave out 16 change vouchers and no none told them were happy about it to which they were told when the next bus would be along and they can wait for that.
It's just lazy to expect the driver to change such big notes in the morning knowing it leaves them with nothing for the rest if the day and they can not get more as can't go to the bank as driving.
So your son knows bus drivers shifts are about 12 hours long with some 45 minute break for the hole day. So to expect them not to eat lunch/ use facilities because they have to wait in a long queue in the bank isn't fair.
Depot staff will happily sort out the change.
Or give head office a call, weekly ticket might work out cheaper as saves money