About purchase order (PO) numbers

You can enter PO numbers during checkout to help track and reference orders.

Administrators can set PO numbers to required or optional during checkout.
Depending on your carrier, the PO number may show up on the shipping label or packing slip.
If you place an order with a third-party seller, your PO number may or may not show up in various locations.
The PO number displays in Amazon Business Analytics reports.

Note: To ensure the PO number displays on the shipping label, enter it in the deliver to field during checkout. The Amazon Corporate Credit Line allows you to enter up to 20 characters in deliver to. A corporate credit card or purchase card allows up to 17 characters in the "deliver to" field.