To get to Schipol Airport from Haarlem, I'll need to take the 300 bus.
But, can you buy a physical ticket for two people from the bus driver with a credit card?
Normally, it seems like you'd swipe your credit card when you enter and leave the 300 bus. But, I would be sharing a credit card with another passenger, and it doesn't like I can do that if there's more than 1 passenger.