Ans: In case you have not received your IMO Admit card/ Roll No/ Participation Certificate, you can request your school Principal/ Mathematics Teacher to inform SOF about the no-receipt of the above. When you enrol, you will be given a receipt that has your registration number and more. SOF will send you the duplicate copies as soon as possible. It is important that you have all the necessary documents a few days before your exam so that you don’t miss out on anything that’s important.