The question in front of a Dutch judge this month was one every bidder has wondered about at some point: if a competitor goes and looks at the site more closely than you did, has the competition been distorted?
The contract and the objection
The municipality of Montferland put out the reconstruction of Zeddam-Zuid — eleven streets between the Vinkwijkseweg and the Tolhuisstraat — and awarded it to the contractor NTP. The losing bidder, Liemers Wegenbouw, went to court to stop the award. Its argument was narrow and specific: during the bidding period NTP had carried out additional borings into the existing asphalt. Knowing more about what lay under the road, Liemers said, let NTP price the risk more tightly and therefore submit a sharper bid than a competitor working from the tender documents alone.
Why the court was not persuaded
The judge rejected every claim, and the reasoning is the part worth keeping. The extra borings, the court found, had produced no new information: they confirmed what an earlier report already said, and that report had been supplied to every bidder. The ruling put it directly — even if NTP gained more certainty about the state of the asphalt by checking, that does not mean competition was distorted. Liemers had not shown that the additional knowledge changed the outcome. It was ordered to pay roughly €4,200 in costs, and the road works can proceed.
The line the ruling draws
The distinction the court is making is between information that is exclusive and information that is merely unequal. A buyer who hands one bidder a document the others never see has distorted the competition. A bidder who takes the trouble to verify a document everyone received has not — it has done the work. Read that way the judgment is less a defeat for the challenger than a description of ordinary diligence: the borings were available to Liemers too, and nothing in the tender prevented it from commissioning them.
What a challenge of this kind has to prove
Cases about information advantage tend to fail on the same element, which is causation. It is comparatively easy to establish that a rival knew something you did not; it is hard to establish that the difference decided the award. Here the challenger had to show that the borings changed the price, and the court found the underlying facts were already in the shared report. A bidder considering a similar challenge is effectively being told to bring evidence about the effect on the bid, not merely about the asymmetry.
IN NUMBERS
The practical takeaway runs the other way from the litigation. If a site investigation can be commissioned during the tender period and the buyer has not forbidden it, the bidder who commissions it is not gaining an unfair advantage — it is taking one that was on the table for everybody. The competitor who skips that step and later argues the point in court will be asked what stopped them.
Source: reporting by REGIO8 on the interim relief ruling in the Montferland tender for Zeddam-Zuid, 27 July 2026. No Otnox platform data is used in this explainer.
