If your business has just been sued, or you expect it to be, one of the most important questions is one almost no owner thinks to ask: do you have to preserve evidence? In California, the answer is yes, and the duty usually starts earlier than owners expect. An otherwise solid defense can get damaged by something as ordinary as an email retention setting.

The problem is rarely bad intent. It is routine. Systems keep deleting things on schedule, employees keep doing their jobs, and nobody connects the lawsuit to the housekeeping.

When the Duty to Preserve Evidence Begins

Most owners assume the obligation starts the day the summons is served. It does not. The duty to preserve generally begins when litigation is reasonably foreseeable.

That can be the day a demand letter arrives. It can be the day a customer’s lawyer sends a threatening email, or the day a dispute with a former partner turns openly hostile. A good-faith belief that “it probably won’t go anywhere” is not a safe harbor if it does.

This is why the question matters even if you have not been served yet. By the time the papers arrive, the clock on your records may have been running for weeks.

The Three Ways Businesses Lose Evidence Without Meaning To

Some of the same quiet failures repeat across industries.

AUTOMATIC DELETION. Many email and messaging systems delete on a schedule, thirty, sixty, or ninety days. Cloud storage and shared drives often do the same. Nobody chose this deliberately. It was a default, and it keeps running after the lawsuit starts.

DEVICES THAT LEAVE THE BUILDING. Employees upgrade phones. Text messages with customers, vendors, and each other live on those phones, and they are among the most important records in many disputes. When the old phone goes in a drawer or a trade-in bin, the messages go with it.

DEPARTING EMPLOYEES. When someone leaves, IT wipes the laptop and reassigns it. That is sound practice in normal times. In the middle of a dispute, the laptop may hold the only copy of what matters.

None of these looks like destroying evidence while it is happening. That is exactly why they are dangerous.

What Happens If Records Are Lost

California courts have real tools for dealing with lost or destroyed evidence. A judge can order monetary sanctions. In more serious cases, a judge can limit what a party is allowed to prove, strike parts of a defense, or in extreme situations enter a judgment against the party that lost the records.

There is a quieter consequence too. A jury can be told that when a party willfully suppresses evidence, it may infer the evidence would have been unfavorable to that party. Think about what that does to a case. You may have had a perfectly good explanation in an email that no longer exists, and now the jury is invited to assume the opposite.

California law does provide some protection for electronic information lost through the routine, good-faith operation of a computer system. Owners sometimes read that as permission to let the auto-delete run. It is not. That protection does not erase the separate obligation to preserve information once a dispute is foreseeable, and a court will ask what you knew and when.

Why the Other Side Cares So Much About Your Records

Business lawsuits are won and lost on documents. Emails show what each side understood. Text messages show what was promised in the moment. Invoices, change orders, and calendar entries establish the timeline. The side that can produce a clean, complete record tells the more believable story.

When your records have gaps, the other side notices. A gap invites questions, and questions about missing records can take over a case that should have been about the merits.

What an Attorney Does Differently

I am not going to give you a checklist here, because the right approach depends on your business, your systems, and the claims in the case. What I can tell you is how the process looks when it is handled well.

An experienced attorney works out what the lawsuit is really about and which of your records bear on it. Then he talks to the people who control the systems, which is usually a conversation with whoever manages your email, your phones, and your files. The goal is to stop the routine deletion that would otherwise run unnoticed, in a way that is documented and defensible, without freezing the whole business.

That documentation matters. If the other side later claims something went missing, being able to show what you did and when is often the whole answer.

Do Not Wait for the Summons

If you have received a demand letter, a threat of suit, or a notice of a claim, do not wait for formal service to start thinking about this. The owners who come through disputes in the best shape are the ones who talked to counsel while they still had every record intact.

If your business has been sued, or you expect it will be, contact the Law Offices of Scott D. Wu at (626) 799-1858 for a consultation.

This article is general information, not legal advice for your situation.