Heyy there,

Hope you are doing good. So, in general, you can check the hall ticket number on your marksheet memo of your 10th class. So, in case if you had lost the certificate, then you can contact your school authorities or board authorities. So, if you had lost the marks memo, you should file a complaint in the police station nearby, and should submit the report to your academic or school authorities, or else directly to the board authorities. They will definitely help you to sort it out.

Hope it helps !