https://www.epo.org/en/service-support/faq/about-us/procurement/invoicing-and-payment/how-can-i-send-invoicecredit-note

How can I send an invoice/credit note that is not in pdf format?

If you cannot send us an invoice/credit note as a pdf, please mail it to one of the following addresses:

Germany

The Netherlands

Austria

European Patent Office

Accounts Payable

Postfach 14 06 69

80456 München

Germany

European Patent Office

Accounts Payable

Postbus 5818

2280 HV Rijswijk

The Netherlands

European Patent Office

Accounts Payable

Postfach 90

1031 Wien

Austria