In a premises case, the video is usually the case. A ten-second clip of the plaintiff stepping into an unmarked spill, or of an employee walking past that same spill four times without a cleanup, does more than any liability expert. That is exactly why defense-side risk managers know the retention clock better than plaintiff counsel do, and why so much usable footage is gone before the first letter arrives.
Understand the overwrite cycle before you write anything
Most retail and commercial surveillance systems run on a rolling loop. Older standalone DVRs overwrite in as little as 14 to 30 days; networked systems at national chains often hold 30 to 90 days, and a few hold longer. The number is not a legal standard, it is a storage-cost decision, and it resets every day. If your client signs up 45 days after a fall, the incident footage may already be a string of zeros on a hard drive.
The practical takeaway is that the preservation letter is not a formality you send after you open the file. It is the first substantive act of the case, and it should go out the day you are retained, by a method that creates proof of delivery. Waiting for records, waiting for the medical picture to firm up, waiting for anything, is how you convert a strong notice case into a swearing contest.
Draft the letter so it actually captures the footage that matters
A letter that demands "all video of the incident" invites a defendant to preserve the 20 seconds of the fall and let everything else roll over. That is the trap. The footage that proves constructive notice is almost never the fall itself. It is the hour before, showing how long the hazard sat there and how many employees passed it, and the aftermath, showing the cleanup, the incident-report interview, and whether anyone photographed the scene.
Spell out the scope with specifics:
- Every camera angle with any view of the location, not just the nearest one.
- A defined window, commonly the full store-open period that day through closing, not a narrow clip around the timestamp.
- Point-of-sale, self-checkout, and entrance cameras that establish traffic and timing.
- The native file with metadata intact, not a screen recording or a phone video of a monitor.
- Any auto-export or "save" the store made under its own incident protocol.
What overwritten footage is worth to you
Counterintuitively, video that a defendant let disappear can be more valuable than video you receive. Once you establish a duty to preserve, the loss of evidence opens the door to spoliation remedies that range from an adverse-inference instruction to evidentiary preclusion, and in extreme cases to terminating sanctions. The three questions a court will ask are consistent across jurisdictions: did the defendant have an obligation to preserve when the evidence was destroyed, what was the level of culpability, and how was the plaintiff prejudiced.
The duty question is where the incident matters. A national retailer that generated an internal incident report, saved a clip for its claims department, and put the matter in the hands of a third-party administrator cannot credibly argue it did not anticipate litigation. Its own protocol proves the anticipation. When you depose the loss-prevention or CCTV custodian, build that record: the retention policy, who has override authority to save footage, whether a save was made here, and if not, why the person who wrote the incident report did not click the button that would have preserved it.
The strongest spoliation motions are not about the lost fall. They are about the defendant preserving the ten seconds that help it and letting the hour that hurts it roll over.
Lock down the retention policy in writing
Serve interrogatories and requests that force the defendant to state its retention period, the make and model of the system, whether the system was functioning that day, and the identity of everyone who accessed the footage after the incident. A defendant that answers "the system overwrites after 30 days" has just handed you the culpability argument if it received your letter on day 12 and produced nothing. A defendant that cannot say whether the system worked has handed you a functionality dispute you can develop at deposition.
These records also feed the broader evidentiary picture the same way an event data recorder does in a vehicle collision case. The defense will argue the footage was routine and unremarkable. Make it prove that by producing the retention log and the access history, not by assertion.
Tie it back to the notice theory
Everything above serves one goal: proving the hazard existed long enough that a reasonable operation should have found and fixed it. Where the footage survives, it does that directly. Where it does not, the spoliation posture lets you argue the jury should assume the lost video would have shown exactly that. Appellate courts reviewing these sanctions, as recent premises rulings confirm, focus less on bad faith and more on whether the defendant controlled the evidence and failed to preserve it after the duty attached.
Send the letter on day one, define the window and the angles, and treat the retention policy as a discovery target in its own right. The clip that decides the case is usually the one the defendant hoped you would never ask about.