esa-p is the supplier portal for ESA’s contractual partners, with the following main features:

• controlled access and visibility on ESA contracts (contractual, invoicing and payment information) to Prime- and Sub-contractors directly paid by ESA;
• submission and approval of electronic invoices and Milestone Achievement Certificates

This web page contains the help documentation for esa-p: http://esa-p-help.sso.esa.int/