Hi,

First, check your registered email inbox and SMS, as CBSE sends the application number after successful registration. If you are not able to find it there then access the official CBSE private candidate portal and use the “Forgot Application Number” option by entering your name, date of birth, mother’s name, and other details to retrieve your application number.

If you still cannot recover it, contact the CBSE regional office or helpdesk. They can verify your identity and help you retrieve your application number,

Check more details on CBSE private candidate form here.