We have not yet designed a Request-to-Pay process for Nexus. Request to Pay essentially allows the Recipient to send a payment request to the Sender, who then approves it. In the most basic implementation, the message (embedded in a link or QR code) sent by the Recipient to the Sender would include all the information required by the Sender to initiate the payment, such as the recipient’s alias or account numbers. More advanced implementations could also include, for example, an invoice ID so that the payment can be reconciled within a specific purchase in the merchant’s point of sale systems.