This document provides instructions for processing single orders as a seller on the Paytm Mall platform. It outlines the four main stages of order processing: 1) confirming and packing the order, 2) generating a challan for handover to the delivery person, 3) marking the order as out for delivery, and 4) delivering the order to the customer and uploading the signed delivery challan. It also explains how to download duplicate copies of invoices or challans, and how to mark an order as returned by the customer.