A single deleted Slack channel can cost a company more than the underlying dispute ever would. Adverse inference instructions, court-ordered forensic exams, seven-figure sanctions, and in some cases criminal exposure all trace back to the same moment: someone at the company knew a fight was coming and the data kept getting overwritten anyway. That moment is where preservation letters and litigation live.
Both tools freeze information in place. They work from opposite sides of the table, though, and the one you’re holding shapes every decision that follows. Get the tension between them wrong and you trade a defensible record for an expensive lesson.
Two Tools Solve One Problem From Opposite Directions
A preservation letter is an outward-facing demand. One side sends it to the other, or to a third party sitting on relevant data, telling them to stop routine deletion of anything that might matter to a coming dispute. A litigation hold is inward-facing. It’s the internal directive a company issues to its own employees and IT systems the moment litigation becomes reasonably foreseeable, whether or not any letter has arrived.
The distinction sounds procedural, but it drives real outcomes. A preservation letter is a signal from a potential adversary; a hold is your own house getting in order. You can receive the first without issuing the second, and courts will still hold you accountable for what your own hold should have captured. The duty attaches to the party, not the paperwork.
The Trigger Is the Same, But the Clock Runs Differently
Your obligation to preserve doesn’t wait for a complaint. It starts when litigation is reasonably anticipated, and courts apply an objective standard to that judgment, not the company’s private optimism. A threatening email, a demand letter, a regulator’s inquiry, or a serious internal complaint can each be enough.
Where the two tools diverge is when the clock starts ticking in practice. A preservation letter puts a date-stamped record on the recipient’s desk, and ignoring it after that is hard to defend. An internal hold has no such external trigger, which makes the harder question when you should have known.
That’s where companies get caught, assuming they had more runway than the objective standard actually gave them. The Judicature analysis of amended Rule 37(e) walks through how courts evaluate whether reasonable steps were taken once that duty attached.
Narrow Scope Beats Sweeping Demands Every Time
Preservation letters often arrive written to freeze the world. Every custodian, every system, every backup tape, indefinitely. Broad demands feel safe to the sender and punishing to the recipient, and they rarely survive contact with a judge who reads them carefully.
Internal holds tend to work better when they go the other direction. Identify the actual custodians, the actual date range, the actual categories of information at issue, and preserve those with real discipline. A tight hold that’s genuinely followed will outperform a sprawling one nobody reads. Two questions worth asking on either side of the letter:
- Who touched this? Name the custodians whose files, messages, and devices actually bear on the dispute, not the whole department.
- What formats live where? Email, Slack, Teams, texts, voicemail, shared drives, personal devices used for work, and third-party platforms all need to be inventoried before anything can be paused.
Sanctions Land Differently Depending on Which Side You’re On
When evidence disappears, the sender of a preservation letter has something valuable in hand: a paper record showing the other side was warned. That letter becomes Exhibit A in the sanctions motion. The recipient, meanwhile, is left arguing that the loss was inadvertent, that reasonable steps were taken, or that no prejudice resulted.
The teeth are in Rule 37(e). The most severe sanctions, including adverse inference instructions, default judgment, and dismissal, are reserved for cases where the court finds the party acted with intent to deprive the other side of the information. Negligent loss can still draw curative measures, but the intent finding is what turns a discovery dispute into a case-ending event. A well-documented internal hold is often among the strongest defenses against that finding.
Each Tool Has Its Moment
Preservation letters do their best work early, before a complaint is filed, when the goal is to lock down a counterparty’s records and create a clean record of notice. They’re also the right tool for third parties who owe no independent duty until asked.
Internal litigation holds are the right tool the moment your own side sees the dispute coming. Waiting for the other side’s letter before issuing one is a mistake companies keep making, and it’s the mistake that turns recoverable cases into sanctioned ones. Bringing in experienced commercial litigation counsel early, before the letter goes out or arrives, is usually what determines whether the preservation strategy holds up under scrutiny.
The tools aren’t interchangeable and they aren’t in competition. One tells the other side to freeze; the other freezes your own house. In most serious disputes, you’ll end up needing both, and the sequence matters as much as the substance.
