Is form 16 of an individual is a public document? can a family court pass an order to furnish

Can a family Court force a party in the divorce case to submit his /her form 16 or salary slip? Or can a court pass an order to income tax department to furnish any individual's income proofs? If so how can one defend this in the court?  I was told by a judge that if I don't give my salary slip the court will summon the income proof documents from the employer? Can this be shared by the company or via RTI to anyone who asks on the same?