When on, a customer who already has an order for the same delivery date on this route to the same zip code and state is not charged the delivery fee again on a second order for that date – the fee is set to $0. This check only excludes an earlier order that was later fully refunded; an earlier order that was cancelled still counts, so a customer's second order that day would still have its fee waived. Turn the toggle off if every order should carry its own delivery fee.