what happens if we write incorrect roll no. in the cbse answer sheet?

youre dead
 

marks will be given to your written incorrect roll number. Like your roll number is suppose be - 1106250 and you have written it 1106251. Then marks will be added to person of 1106251. There will be a confusion too for Boards as they might surprise to know one person having 2 marks. Simply, you will get no marks or they will try to manage...

u didnt write or did u write wrong??

try to inform ur school teachers immediately!! if u have done this mistake!!
school teachers will be the best helper!!
may be they will try to contact cbse board for help!!
don't take tension

actually i wrote serial number correctly but dont remember whether it is correct in words.

If this will happens then the marks will not added to your report card