This document provides instructions for enumerators and supervisors updating India's National Population Register (NPR) in 2020. It outlines the roles and responsibilities of various field functionaries involved in the NPR update process. Enumerators are instructed to visit each household within their assigned area to update demographic information for each usual resident. They are to collect updated details like Aadhaar number, mobile number, voter ID and other identification numbers voluntarily. Enumerators must fill or update NPR booklets and submit all materials to the charge officer upon completion through their supervisor. Quality assurance measures like inspections and certifying full coverage are also described.