See if you are appearing for a counselling (you didn't mentioned the name ) and if you are asked to provide the school bonafide certificate, then you have no options left than to provide it. To get a School Bonafide certificate visit your school with your 10th and 12th Registration certificate/Marksheet and Hall ticket and request your officials. They will issue it and it won't create much of a problems. At this moment's most of the schools are open, so you may not face any problem. I would recommend you to contact your school immediately.

Have a great eve! :-)