Evidence Is Most Expensive to Reconstruct Once It Is Gone

Can your company explain a decision it made three years ago? The question arrived three years after the decision. A buyer, auditor or regulator requested the basis for a business claim made in 2023.

The person who made the decision no longer worked for the company. The system in which the documents were stored had been replaced. Emails from that period had been deleted in accordance with internal policies. The director remembered that the decision had been reasonable. But could not show why.

Time Is Part of the Evidence

Most companies think of evidence as a document. It either exists or it does not. It is either found or it is not. But evidence also has a temporal dimension. The gap between the moment something happened and the moment someone asks about it may be one week. It may also be five years. The greater that gap, the more substantiation depends on records preserved from the time the event occurred, as well as on the possibility of independently verifying them today.

Evidence Rarely Disappears Intentionally

No one needs to hide anything. People leave the company and take their knowledge with them.

Systems change, while old data remains in formats that no one can open anymore. Document versions are overwritten rather than preserved. Documentation is deleted when its retention period expires. This last point deserves precision. Retention periods exist for a reason, and complying with them is lawful.

Lawful deletion of documentation and unlawful destruction of evidence are not the same thing. But the consequence can be similar: when the question arrives, there is nothing to show. Retention periods determine how long certain documentation must or may be kept. In themselves, they do not answer the question of how long a business decision may remain subject to retrospective scrutiny. That gap is rarely taken into account.

Why Reconstructing Evidence After the Fact Is Expensive

When evidence does not exist, the company tries to create it after the fact. It asks people what happened. It searches for copies in different places. It puts together an explanation from memories and fragments.

Even when the reconstruction is carried out in good faith, it does not have the same evidentiary strength as a documented record created at the time the decision was made. An independent party must be able to assess not only what the company claims today, but also what supports its ability to substantiate that claim. That is why reconstruction is more expensive than it appears. It does not cost only the time of the people doing it. It can also cost the credibility of everything it is intended to prove.

From My Experience in Criminal Proceedings

In criminal proceedings, the defence often begins only after the question has already been raised. That is when it becomes clear what exists. What was recorded at the time of the event, and what is remembered afterwards. What can be verified, and what rests on someone's word. That distinction is learned early and learned the hard way. The same distinction exists in business, but it is rarely visible until someone asks.

The best defence of a business decision does not begin when someone challenges it. It begins much earlier, in the way the decision is made and how its record is preserved. Corporate scrutiny, audits and criminal proceedings are not the same, and their standards differ. But the underlying question is similar: what is known, where does that knowledge come from, and can it be demonstrated?

What Can Be Done in Advance

None of these measures requires a large budget:

Identify which decisions are material
There is no need to preserve a record of every decision. It is necessary to know which ones could be challenged: decisions about suppliers, published claims, and data shared with buyers and auditors.
Preserve the record of the decision together with the decision itself
Not just the final document, but who made the decision, on what basis and what was known at the time.
Align retention periods with the period during which a decision may be scrutinised.
Retention periods depend on regulations and the type of documentation, so they should be checked for each category. But the question needs to be asked: how long might we have to explain this decision?
Ensure knowledge is transferred when people leave
The departure of the person who made the decision must not mean the departure of the basis for that decision.
Preserve what exists in a system when replacing it.
Data migration is the moment when evidence is most easily lost, because no one realises they are losing it.

The Question Every Board Should Be Asking Today

Take one material decision your company made three years ago.

Can someone today demonstrate:

who made the decision?

on what basis?

what was known at the time?

and where it was recorded?

If the answer is unclear, the problem is not that someone destroyed something. The problem is that evidence was never part of the decision. Evidence is cheapest to create at the moment the decision is made.

Every following day increases the cost of preserving and potentially substantiating it. And once the original record disappears, money can pay for reconstruction. It cannot bring back the time when the evidence was created.