@Phil106 since their stay is in July and they selected the option to pay half when booking and half before their stay they will get the notification to pay soon. Usually they pay about 2 weeks before arrival. There is nothing you or they can do to change that since that is the option they selected. Airbnb will automatically charge the original payment method they used and they have to make sure they have enough money on their credit car because if not, Airbnb will cancel their reservation.