How is a backordered item resumed when it arrives?

When a backordered item arrives, fulfilment for it resumes automatically and the customer is notified. The order "remembers" the outstanding portion, so restocking the item triggers the continuation of its fulfilment rather than requiring someone to manually hunt down which orders were waiting on it. This closes the loop on partial fulfilment: the customer who waited gets their item…

When a backordered item arrives, fulfilment for it resumes automatically and the customer is notified. The order "remembers" the outstanding portion, so restocking the item triggers the continuation of its fulfilment rather than requiring someone to manually hunt down which orders were waiting on it. This closes the loop on partial fulfilment: the customer who waited gets their item shipped as soon as stock returns, without re-ordering.