Hello Aspirant,

No they will not cancel your candidature because now there is no need to take even the undertaking at examination center because there is no any requirement of it, neither your category certificate nor your undertaking is required for examination until and unless you belongs to PwD category but yes you have to arrange your category certificate any how by the time of admission because during document verification you will have to submit the original category certificate.

I hope this information helps you.

Good Luck!!