In civil litigation, a ruling on liability is often treated as the end of the case. It is not.
Even when liability has already been determined, the plaintiff still must prove damages. That is the point of a proof hearing in cases where a plaintiff seeks a default judgment or in a jury trial on damages where liability already has been established.
In the context of a default judgment in New Jersey, when damages are not for a sum certain, Rule 4:43-2(b) permits the court to require proof of damages before entering judgment, and the same principle applies more broadly whenever damages remain to be quantified after liability has been decided. A proof hearing is not a formality; it is the stage at which the plaintiff must prove actual loss with competent evidence.
That distinction matters because damages law is stricter than many litigants assume. New Jersey courts do not award damages based on speculation, inflated estimates, or unsupported arithmetic. “Actual damages are those that are real and substantial as opposed to speculative.” Grunwald v. Bronkesh, 131 N.J. 483, 495 (1993). Damages must be proven with reasonable certainty. Iuliucci v. Rice, 130 N.J.L. 271, 275 (E. & A. 1943); Hirsch v. General Motors Corp., 266 N.J. Super. 222, 242 (Law. Div. 1993). And the point of compensatory damages is not punishment or leverage; it is to place the injured party in as good a position as performance would have done. 525 Main St. Corp. v. Eagle Roofing Co., 34 N.J. 251, 254 (1961); Nappe v. Anschelewitz, Barr, Ansell & Bonnello, 97 N.J. 37, 48 (1984). As New Jersey courts have repeatedly recognized, the law abhors damages based on mere speculation. Mosley v. Femina Fashions, Inc., 356 N.J. Super. 118, 128 (App. Div. 2002).
Just as important, a proof hearing is not one-sided. Even after default, a defendant may appear, contest damages, cross-examine witnesses, present mitigation evidence, and object to speculative proofs. The Appellate Division made that clear in Chakravarti v. Pegasus Consulting Grp., Inc., 393 N.J. Super. 203, 210-11 (App. Div. 2007).
This is where many damages claims begin to fall apart. Plaintiffs often start with a gross number and assume the court will work backward. But courts should ask harder questions. Was the claimed loss proven with documents? Was there competent testimony supporting value? Were offsets, credits, liens, expenses, collectability, or other real-world economic facts ignored? If so, the damages theory may be little more than advocacy dressed up as calculation.
That is why proof hearings matter. They force the plaintiff to move from accusation to evidence. They force the numbers to be tested. And they give the court the opportunity to distinguish between a viable claim for compensation and an attempted windfall.
The practical lesson is simple: winning on liability does not automatically win damages. Proof still matters. In many cases, it is the most important part of the case.