There are two types of orders: pre-paid and post-paid. If a customer books a pre-paid order, they pay before the service is provided, a post-paid order is only paid afterwards.
The order type is determined by the Type of payment parameter of the service that is set when you add it to the marketplace, meaning that neither you nor the customer can choose the order type for each individual order.
Both pre-paid and post-paid orders consist of similar stages, but the order and certain details are different.