Cancellation of caste certificate

A valid certificate can not be canceled unless through a declaration suit.  Not using that certificate is enough to overcome the problem.

What is the problem / query for consideration and obligation ?

The caste certificate is issued by the revenue department.

If at all you found it was obtained by playing fraud on the authorities by the concerned person, you may make a complaint with documentary evidence to the authorities concerned and request for taking necessary legal action against the fraudulent person for this illegal activity.