Yes, you will get your lost hall ticket again.

Here are things you can do: -

Contact School or College: -

Firstly, contact the administrative office of your school or college. They would surely have a record and will issue you a duplicate hall ticket.

Contact the Exam Board :

If you are giving board exams, then you can get in touch with the respective board such as CBSE, ICSE, State Board. They may have a procedure of issue duplicate hall tickets.

Check Your Email: Many a time, your hall tickets are sent via email. You must check both your inbox and spam mail.

Online Portal:

Ensure if your exam board has an online portal. Then you might be able to retrieve your hall ticket from that link using your registration number or other credentials.

DO NOT forget to apply promptly and provide as many details as you can, like your name, roll number, and exam center address.

Good luck!