How does an order split into one fulfillment per vendor?

When an order is created, it is divided into one Fulfilment per vendor involved. Each fulfilment carries that vendor's lines, its fulfilling branch, and its own status lifecycle, while the parent order represents the customer's single purchase. For a single-vendor store that's one fulfilment per order; for multi-vendor baskets it's several. This structure — order on top, vendor fulfilments…

When an order is created, it is divided into one Fulfilment per vendor involved. Each fulfilment carries that vendor's lines, its fulfilling branch, and its own status lifecycle, while the parent order represents the customer's single purchase. For a single-vendor store that's one fulfilment per order; for multi-vendor baskets it's several. This structure — order on top, vendor fulfilments beneath — is what makes split fulfilment, per-vendor settlement, and independent vendor handling all possible from one customer order.