For Census 2026 in India, there is no strict requirement to submit documents because the process is mainly based on self-declared information collected by officials from the Office of the Registrar General & Census Commissioner, India, which means you can simply provide accurate details verbally without showing proof in most cases, however keeping some basic documents like Aadhaar Card, Voter ID, Ration Card, and a mobile number can be helpful for ensuring correct information and avoiding mistakes during data collection, as these documents may assist you in recalling exact details such as age, address, and family members, the census mainly focuses on general information including name, gender, age, education, occupation, and housing conditions, and it is important to understand that genuine census officers will never ask for money, bank details, OTPs, or passwords, because the entire process is free and meant only for statistical purposes, if anyone asks for such sensitive information, it is likely a scam and should be reported immediately to the Government of India or local authorities, staying aware, providing accurate information, and verifying the identity of the officer are the best ways to safely complete the census process.