Booking fee or earned money is an amount of money that must be paid as a down payment or commitment. Booking fees are often used when we make transactions such as purchasing property, apartments, land, booking hotels, flight tickets, etc. In general, booking fees are only valid for a certain period according to the transaction, so buyers must also immediately pay off the payment process so that the booking fee does not expire. Booking fees are often considered only as seriousness or commitment money, so if the buyer cancels the transaction, the booking fee will often be lost, because the seller/developer has lost the opportunity to sell items to other customers. However, are there any advantages of booking fees?