A client calls with a problem. Maybe a former employee is threatening to sue. Maybe a vendor relationship has gone sideways and a dispute looks likely. Maybe they've already been served.

The first conversation is always about facts and strategy. But experienced litigators know to ask something else in that first call: "Have you done anything to preserve your records?"

If the answer is no, the next thing you do is a litigation hold.

What Is a Litigation Hold?

A litigation hold (sometimes called a legal hold or document preservation notice) is a formal instruction to preserve all potentially relevant documents and data once litigation is "reasonably anticipated." That means emails, files, text messages, contracts, calendar entries, and anything else that might matter in the dispute.

The hold is typically communicated in writing to employees and others who might have relevant information. It tells them: stop deleting things. Stop modifying things. Turn off any automated purge routines. Keep everything that might relate to this matter intact until further notice.

The legal basis for the obligation comes primarily from the Federal Rules of Civil Procedure, specifically the duty to preserve ESI (electronically stored information) embedded in FRCP 26 and 37. Most state courts have adopted similar frameworks. The short version: if you know (or should know) litigation is coming, you must preserve relevant records. Failure to do so can result in sanctions ranging from adverse inference instructions to case-dispositive rulings.

For small firm attorneys advising business clients, issuing the hold is usually your job. The client does not know they need to do it, and they definitely do not know when.

When Does the Duty to Preserve Attach?

This is the question that trips people up most often. The duty attaches not when a lawsuit is filed, but when litigation becomes "reasonably anticipated." Courts interpret this broadly.

Some examples of triggering events:

• Receiving a demand letter from opposing counsel or a party directly
• An employee filing an EEOC charge or similar administrative complaint
• A customer notifying the company they intend to dispute a charge or contract
• An internal investigation revealing conduct that is likely to produce litigation
• A serious accident or incident on company premises or involving company products
• A regulatory inquiry that signals possible enforcement action

The phrase "reasonably anticipated" does the heavy lifting. Courts have held that it includes situations where a reasonable person in the company's position would recognize the substantial likelihood of future litigation. If the situation is serious enough that someone is calling a lawyer, that is usually enough.

The practical implication for small firm attorneys: your engagement with the client may itself be the trigger. Once they have retained you because a dispute looks possible, the duty has likely attached. The hold should go out immediately.

What Does a Litigation Hold Cover?

The scope of a litigation hold should match the scope of the anticipated dispute. You do not need to preserve everything in the company forever. You need to preserve everything that is potentially relevant to the claims and defenses likely to be at issue.

For most business litigation, that means:

Email. This is usually the most important category. The litigation hold email notice needs to be specific about what accounts are covered, what date range is relevant, and what topics are at issue. It needs to instruct recipients to stop deleting email and to disable any automatic deletion or archiving settings.

Other electronic files. Contracts, spreadsheets, presentations, financial records, internal reports. Anything stored on company servers, shared drives, or personal devices used for work.

Text messages and instant messages. Often forgotten, increasingly relevant. If employees use Slack, Teams, WhatsApp, or personal text messages for work, those may be in scope.

Physical documents. Paper contracts, printed emails, handwritten notes. Less common in modern matters but still relevant.

Voicemails. Some enterprise phone systems retain voicemail recordings. These are frequently overlooked.

The hold notice should be specific enough that recipients understand what to preserve, but not so narrow that it misses categories of documents that turn out to matter later. When in doubt, preserve more.

The Anatomy of a Proper Litigation Hold Notice

A litigation hold notice does not need to be a lengthy legal document. It does need to cover certain elements clearly.

Who it goes to. The hold notice should reach every employee or custodian who is likely to have potentially relevant information. At minimum, the key players directly involved in the dispute. Often it also includes their supervisors, the company's IT team (critical for disabling automated deletion policies), and HR.

Why it is being issued. You do not need to disclose litigation strategy, but the notice should explain that a legal matter is pending or anticipated and that the company has an obligation to preserve records related to it.

What to preserve. Be specific about categories: email accounts (list them), shared drives (name them), personal devices used for work, text message threads. The more specific you are, the harder it is for a recipient to claim they did not know a category was covered.

The date range. Provide a starting date for the preservation period. This is usually when the relevant events began, with a reasonable buffer before. The end date remains open until the hold is lifted.

What not to do. Explicitly instruct recipients not to delete, modify, or destroy any potentially relevant documents, not to allow automated systems to do so on their behalf, and to contact you if they are unsure whether a particular document is covered.

How to acknowledge. Ask recipients to confirm in writing that they received and understood the hold. An email reply works. Keep a copy. This acknowledgment is your first line of defense if spoliation is later alleged.

The Auto-Delete Problem

This is the issue most clients have never thought about, and it is a significant one.

Many companies, especially those using Microsoft 365, Google Workspace, or on-premise Exchange, have automated email retention policies that delete messages after a certain period. These policies are often set by an IT vendor years ago and forgotten entirely. A 90-day or 180-day deletion policy can quietly destroy relevant email while a litigation hold is theoretically in place.

The litigation hold must address this directly. Your notice to IT should include an explicit instruction to disable any automated deletion policies affecting the accounts of relevant custodians for the duration of the hold. Courts have imposed sanctions when automated deletion continued after a hold was issued simply because the hold notice did not specifically reach the IT team or did not instruct them to suspend the relevant policies.

When you issue the hold, verify that IT has received and understood the instruction. Follow up. Ask for written confirmation that auto-delete has been suspended for the covered accounts.

Common Mistakes (and Their Consequences)

Waiting too long. The most common mistake is not issuing the hold promptly after the duty attaches. Even a few weeks of delay can result in the loss of documents that automated deletion policies would have purged. Once documents are gone, the analysis shifts from "did you preserve?" to "why didn't you preserve?" That is a much harder conversation.

Sending it to the wrong people. A hold notice that goes only to the employees directly involved in the dispute may miss custodians whose emails are also relevant. In an employment matter, the relevant custodians often include HR personnel and managers who were never party to the dispute themselves.

Not following up. Issuing the notice is step one. Verifying that people understood it, acted on it, and are actually preserving records is step two. Do not assume compliance.

Failing to update the hold as facts develop. As discovery proceeds, you may learn that additional custodians are relevant, or that the date range needs to extend further back. Update the hold and document the update.

Lifting the hold too early. A litigation hold should remain in place until the matter is fully resolved, including any appeal period. Lifting it prematurely and then losing documents during that window creates problems even if the underlying case has settled.

What the Notice Should Look Like

If you are drafting a litigation hold notice for client employees, the practical format is a clear, direct email from legal counsel (or from the company, at legal counsel's instruction). Not a memo buried in a company portal. An email, because that is what employees will actually read.

Subject lines like "LEGAL HOLD NOTICE: [Matter Description] - Action Required" signal the seriousness without requiring the recipient to parse legal language.

The body should be written in plain English. Most of the employees receiving this notice are not lawyers. They need to understand what they are being asked to do. If you send them a notice dense with legal citations, they will skim it and may not actually comply.

Keep it under a page. Include:

• A one-sentence explanation of why the hold is being issued
• A list of the categories of records to preserve
• Clear instructions on what not to do (no deleting, no archiving, no routine cleanups)
• A contact name for questions
• A reply-to-confirm request

After the Hold: Building the Email Record

Issuing the litigation hold email is the beginning of the preservation process, not the end. Once records are preserved, the next step is collecting and organizing them for review and potential production.

For email specifically, this means:

• Accessing the preserved mailboxes directly, via IMAP or administrative access, rather than relying on forwarded copies
• Searching within the defined scope: custodians, date range, keywords, and relevant parties
• Building a chronological record of the relevant email communications, with metadata intact
• Reviewing for privilege before any production

For small firms, this is often where the hours disappear. Manual email review and chronology-building across several custodian accounts is slow, and the output is usually not in a format that is easy to share with co-counsel, opposing counsel, or the court.

ThreadLine was built for exactly this workflow. Once a hold is in place and collection begins, connect the relevant accounts via IMAP, specify the custodians and date range, and ThreadLine generates a complete, court-ready chronological email timeline. The output is a clean PDF or a secure, time-limited shareable link. All data is encrypted with AES-256. Shared links expire automatically. No email content is ever stored in plaintext.

Your first timeline is free at threadline.app, no credit card required.

The Short Version

A litigation hold is a written instruction to preserve potentially relevant records once litigation is reasonably anticipated. For email, that means notifying relevant custodians, suspending automated deletion policies, and verifying that records are actually being kept. The hold should go out early, cover the right people, be specific about what to preserve, and be documented with written acknowledgment.

Issuing the hold is the easy part. The harder work is what comes after: collecting, organizing, and reviewing the preserved email record. That is where cases are won and lost, and where a structured process makes all the difference.