The whitepaper gives a concise overview of the current global market situation for electronic invoices. All the involved parties, from the invoice sender to the financial institutions to the debtor, can reap the benefits of extensively digitalised invoicing and bill payment processes. Request to Pay is the standard for the logical next step: the electronic payment instruction regarding the invoice amount as a one-click solution. For that, RTP can be used both as a stand-alone solution and an addition to the e-billing. Financial service providers should act now and prepare their IT systems accordingly.