https://www.epo.org/en/service-support/faq/about-us/procurement/invoicing-and-payment/what-are-purchase-order-numbers-po

What are purchase order numbers (PO) and funds reservation numbers (FR) and where can I find them?

Under the EPO's purchasing procedures we can only pay supplier invoices/credit notes which contain a valid reference number issued by the EPO ordering department. The types of reference number and their format are shown below.

Purchase order (PO) number

"POxxxxxx"

Funds reservation (FR) number

"32xxxxxxxx-xx"

All PO numbers have 6 digits. All FR numbers have 12 digits. Please put a dash prior to the last two digits of the number, as indicated in the box above.

If you do not have a purchase order (PO) or funds reservation (FR) number, please contact the responsible person who sent you the order for the goods/services.