How does each vendor handle its own portion of a split order?

Each vendor handles its own fulfilment portion independently: it sees its lines, runs its own fulfilment steps (verify, pay check, stock, pack), and arranges its own delivery for its part. The portions can progress at different speeds and even be delivered separately. So in the two-vendor example, Vendor A packs and ships its two items while Vendor B handles its three — each tracked on its…

Each vendor handles its own fulfilment portion independently: it sees its lines, runs its own fulfilment steps (verify, pay check, stock, pack), and arranges its own delivery for its part. The portions can progress at different speeds and even be delivered separately. So in the two-vendor example, Vendor A packs and ships its two items while Vendor B handles its three — each tracked on its own fulfilment — yet both roll up to the customer's single order view.