For Major / Adults ( Mandatory Documents)

Photo : One Passport Size
Photo ID Proof : Pan card / Passport / Driving Licence / Aadhar Card / Voters Id
Address proof : Ration Card or Aadhar Card or Electricity Bill
Application Form : Duly Signed Application Form with all details Old & New Name, Correspondence address, Contact Details & reason for Name change
Optional : Marriage certificate ( if Any for Female after Marriage ) Affidavit ( If Any Made for any reasons like Adoptions etc ) Divorce papers ( Incase of Divorce ) etc

For Minor below 18 years (Mandatory Documents)

Photo: One Passport Size Photo
ID Proof: Aadhar card or School id or Aadhar Card
Address Proof: Ration card or Aadhar Card
Age Proof: Birth Certificate or Bonafide
Application Form : Duly Signed By Minor if possible and parents or Guardians