3.4.21 Purchase Order Number

Purchase Order Number is the unique customer-issued identifier for tracking the lifecycle of a purchase. This identifier is typically provided by the customer to the invoice issuer to ensure that charges are mapped to specific internal procurement records or purchase orders.

PurchaseOrderNumber MUST adhere to the following requirements:

• PurchaseOrderNumber MUST be of type String.
• PurchaseOrderNumber MUST conform to StringHandling requirements.
• PurchaseOrderNumber MAY be null.
• PurchaseOrderNumber MUST represent the identifier used by the customer to uniquely identify the purchase order responsible for the charge.

The unique customer-issued identifier for tracking the lifecycle of a purchase.