Well head office know the rules since they went to great lengths to ensure the ticket vending machines never issue more coin in change than the legal limit
Speaking as a former bank official, you get very very good at counting piles of coin quickly so it shouldn't be a problem, they ask for correct change now they don't want it, generally you need to buy in change (below 1 euro coins) in the retail business so we are doing them a favour
This guy won't last much longer
