About the NOC
The NOC is a written declaration from the owner of the premises stating they have no objection to the property being used as the company's registered office. It is required for Private Limited, OPC, and LLP registrations. It does not need to be notarised but must be signed by the property owner.
If you own the property yourself, a utility bill in your name is generally sufficient and a separate NOC may not be needed — however, including one is recommended to avoid query.