The customer address is the billing address of the purchase order, it serves as a crucial reference point for ensuring accurate financial transactions. 

For Stock Items, the billing address will default to the company’s registered billing address. However, for Drop Shipments or Quoted Items, the billing address will reflect the customer’s details, ensuring that invoices are sent to the correct recipient. 

This distinction helps maintain transparency and accuracy in financial documentation, reducing the risk of miscommunication or billing errors.