Civil litigants must preserve electronically stored information when litigation is reasonably foreseeable. If relevant messages or files disappear, courts may impose measures ranging from additional discovery to an instruction permitting jurors to infer that the lost evidence was unfavorable. Because routine systems overwrite data automatically, however, loss does not by itself reveal culpability. A company may fail to suspend deletion because a vague complaint did not yet make litigation foreseeable; an employee may erase a device contrary to a well-designed preservation notice; a backup may prove technically unusable despite reasonable care.

Sanctions should therefore be matched to both fault and informational prejudice. The first inquiry is reconstructive: what proposition might the missing material have established, and can logs, recipients' copies, or other sources supply a reliable substitute? If equivalent evidence exists, costly punishment does little to restore adjudication. If the loss creates genuine uncertainty, the court should then ask who controlled the preservation process, what steps were feasible, and whether conduct was negligent, reckless, or intended to deprive the opponent of evidence.

Some judges resist separating prejudice from culpability. They argue that a party who intentionally destroys evidence should face the strongest inference even when the opponent can reconstruct most of it; otherwise deliberate misconduct becomes risk-free whenever destruction happens to fail. That concern is valid, but it supports penalties directed at misconduct rather than distortion of the merits. Fees, contempt, or evidentiary limits may punish defiance. Telling jurors to presume a fact that surviving evidence already resolves can manufacture an inaccurate verdict in the name of integrity.

Conversely, severe prejudice may follow from modest fault, particularly when decentralized data vanish before counsel can act. In that situation, remedial measures may be necessary even without moral condemnation: allowing broader testimony about the gap, reallocating proof burdens narrowly, or excluding a claim that cannot fairly be tested. The governing principle is fit. Measures affecting the verdict should repair an evidentiary imbalance and should grow stronger only as the combination of prejudice and culpability warrants. The law protects both accurate adjudication and compliance, but it should not pretend those goals always require the same tool.

Proportionality also requires written findings. A court should state separately what was lost, why substitutes fail, what preservation conduct was blameworthy, and how the selected measure addresses each problem. Separate findings make appellate review possible and discourage the intuitive but mistaken move from anger at deletion directly to an inference about the disputed facts. They also tell future litigants which preservation practices the court considered feasible.