There’s been (note the past tense) an assumption that creeps into a lot of divorce cases: If the evidence is important enough, the court will let it in.
But in Prisbey v. Prisbey (2026 UT App 39), the Utah Court of Appeals did not hedge, soften, or excuse. Because one party ignored Rule 26 disclosure deadlines and the trial court let the evidence in anyway, the Court of Appeals vacated the trial court’s decision outright and sent the case back for a new trial.
Learn the lesson Prisbey has to teach.
The Pretrial Disclosures Rule Is Not a Suggestion
Utah Rule of Civil Procedure 26 requires parties to disclose witnesses and documents early, without waiting for a request. And Rule 26(d)(4) imposes a blunt consequence:
If you don’t disclose on time, you don’t get to use the evidence—unless you prove either harmlessness or good cause.
Not “the court thinks it’s fair to disclose late.”
Not “the other side probably knew about this stuff already.”
Not “we need this evidence to be considered to prove our case.”
The party who missed the deadline bears the burden.
In Prisbrey, that burden wasn’t even close to met.
What Happened
The facts are almost a checklist of what not to do.
One party failed to provide initial disclosures at all. Not late. Not incomplete. Not deficient. Just not done.
Deadlines passed. Discovery closed. The court even reopened discovery and set a new deadline. Still nothing.
Then—three weeks before trial—65 exhibits and multiple witnesses were disclosed for the first time.
The opposing party objected and moved to exclude. The trial court denied that motion and let the untimely disclosures in. That decision didn’t survive appeal.
“No Surprise” Is Not the Test
Trial courts sometimes rely on instinct: if the other side “knew about” the documents anyway, what’s the harm? The Court of Appeals rejected that outright.
The harm is not just surprise. The harm is losing the ability to conduct discovery.
Even if you’ve seen the documents before, you don’t know:
- how they’ll be used,
- what arguments they’ll support,
- what follow-up discovery you should take,
- or what you can safely ignore.
That lost opportunity is prejudice.
“We Needed the Evidence” Is Not Good Cause
The opinion also draws a line attorneys cross more often than they realize. Good cause means: explain why you failed to disclose on time. “We need this evidence” or “we can’t prove our case with it” are not the same thing. If they were enough, disclosure deadlines would be meaningless. The Court of Appeals says as much.
The Consequences Are Real
This wasn’t a harmless procedural misstep.
The late-disclosed evidence—bank records—became the foundation for a key ruling: that the wife contributed $187,000 to a premarital home, converting it into marital property. Take away the improperly admitted evidence, and the finding collapses.
So the Court of Appeals did what trial courts are often reluctant to do; it vacated the judgment and ordered a new trial. Not a warning. Not a partial remand. A full reset.
What This Means for Attorneys and Their Clients
Clients tend to think of discovery as paperwork. Something technical. Something their lawyer will “handle.”
That’s a mistake.
Your case can turn on whether documents were disclosed on time—not whether they exist, not whether they’re persuasive, but whether they were disclosed when the rules required.
In Prisbrey, the wife may ultimately prove the same facts at a new trial. But she lost an entire judgment—and bought herself another round of litigation—because the process wasn’t followed. That’s the risk.
Prisbey is not a case about technicalities. It’s about fairness in how cases are built and decided. The Court of Appeals is telling us, plainly: If you want to use evidence, you have to play by the rules that give the other side a fair chance to respond. Ignore that, and even a winning case can come undone.
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