Dispute amount of debt owed
The burden of proof is upon the plaintiff, not you to prove the amount of debt you owe.
The defendant can request the the plaintiff file a “Bill of Particulars” to the court which is a form that explains exactly why the plaintiff is taking action against the defendant. However, the plaintiff can also make the defendant file a “Grounds of Defense” which has the defendant explain why he/she does not want to pay the debt.