To use an alternate item identifier on a purchase item, what must you do?

To utilize an alternate item identifier on a purchase item, it is necessary to add it to the spend category. This process ensures that the alternate identifier is linked to the relevant spend category, which helps in organizing and managing the procurement of items efficiently. By associating the alternate item identifier with the spend category, the organization can better track spending patterns and manage inventory, leading to improved operational efficiency.

In terms of the other choices, while registering with the supplier, including it in the purchase order, or verifying with the inventory team may be important steps in different contexts, they do not specifically address the requirement for adding an alternate item identifier within the spending framework essential for procurement processes. The focus on the spend category highlights its critical role in the categorization and management of items within the procurement system.