How do I add an internal purchase order number (PO) or internal account number?

Your Purchase Order number can be added to the end of your Billing Address in the Additional Information field. To modify your invoice:

• From the User Home, please navigate to the Generate Invoice page. Note that only the submitting author can generate or update invoices related to the article they submitted.
• Fill in your Billing Address and input your Purchase Order  in the Additional Information field.
• Complete the rest of the steps to generate or update an invoice.

See also:

• Where can I find/generate an invoice for the Article Processing Fee