A litigation hold is the mechanism by which a party suspends its normal document retention and destruction practices because it reasonably anticipates litigation. The trigger is not the filing of a lawsuit - it is the point at which a reasonable party would foresee that a claim is likely, which can be as early as a demand letter, an internal incident report, or a pattern of customer complaints. Once that point is reached, the duty to preserve attaches automatically, regardless of whether outside counsel has been retained or a complaint has been drafted. Waiting for service of process is a common and costly mistake.

In practice, a hold is implemented through a written notice to relevant custodians identifying the subject matter, the categories of material to preserve, and instructions to suspend auto-delete policies, backup rotation, and routine purges covering email, messaging platforms, shared drives, and mobile devices. The notice should be revisited as the anticipated scope of the dispute changes and periodically reissued so custodians do not forget it. Legal and IT typically coordinate the technical side - disabling deletion jobs and preserving forensic images where warranted - while legal defines the substantive scope of what counts as relevant material.

The consequence of getting this wrong is spoliation. Federal Rule of Civil Procedure 37(e) governs lost electronically stored information: if it should have been preserved and was lost through a failure to take reasonable steps, a court can order measures no greater than necessary to cure the prejudice, and, only on a finding of intent to deprive the other side of the information, impose severe sanctions such as an adverse inference instruction or case-dispositive relief. State courts apply comparable common-law spoliation doctrines with their own remedies.

In-house counsel and litigation teams issue holds the moment a dispute becomes foreseeable, because a defensible hold - timely, well-scoped, and documented - is the strongest protection against spoliation exposure later. Outside counsel routinely tests the hold's timing and scope in discovery disputes, since a late or narrow hold can become an independent issue in the case, separate from the underlying merits.