This document outlines the process for single order processing and delivery for self-delivery orders on Paytm Mall. It discusses confirming an order, generating and downloading the delivery challan, uploading the signed challan to mark the order as delivered, downloading duplicate copies of invoices or challans, and marking an order as returned. The key steps are confirming orders, selecting a delivery person, downloading and getting the customer to sign the challan, uploading the signed challan to mark the order as delivered, and marking returns.