How does the customer still see a single unified order and invoice when split?

Even when fulfilment is split across vendors, the customer sees one unified order and one invoice. The split exists behind the scenes (multiple fulfilments under one order); the customer-facing view aggregates them into a single purchase with a single total. This is deliberate: shoppers shouldn't have to reason about which seller stocks what — they place one order, pay once, and track one…

Even when fulfilment is split across vendors, the customer sees one unified order and one invoice. The split exists behind the scenes (multiple fulfilments under one order); the customer-facing view aggregates them into a single purchase with a single total. This is deliberate: shoppers shouldn't have to reason about which seller stocks what — they place one order, pay once, and track one order, while the platform orchestrates the multiple vendors fulfilling it. It's "one order to the customer, many fulfilments to operations."