Hello student

Immediately you have to inform to the exam supervisor he will allow you to write the exam paper that day.if you have a photocopy of the hall ticket submit it to the the exam supervisor.

After the exam is ended you have to write a letter to the exam supervisor for your lost of hall ticket. Then go to the regional centre of ICSI and apply for a duplicate copy of your hall ticket. This Is the process of getting duplicate hall ticket for exam.

Hope this helps.