Submit tip-offs
Does a company not comply with antitrust rules? Are your competitors making arrangements about prices or clients? Let us know. Furthermore, you can contact us as well when companies fail to comply with energy or transport rules or with the Dutch Act on Financial Oversight.
Your tip-off is of great value to the NMa
The NMa greatly values your tip-offs. They may help us track down violations. You can submit a tip-off in one of the following ways:
For consumers
Please submit your tip-off to consumer information portal ConsuWijzer (in Dutch).
For businesses
• Submit a tip-off online (in Dutch) [link naar Meldingsformulier Tips]
• For questions concerning competition (in general) or transport, please call +31-70-330-1306.
• For questions concerning energy, please call +31-70-330-3545.
• Open Monday through Friday, 9 a.m. and 5 p.m.
• By email
• By regular mail:
NMa
P.O. Box 16326
2500 BH The Hague
The Netherlands
What happens with your tip-off?
• We register your tip-off.
• We will always confirm that we have received your tip-off.
• We will treat your tip-off confidentially.
• If necessary, the NMa will contact you for additional information.
• The NMa reviews all tip-offs. If needed, we will take action.
• We are unable to let you know what will happen with your tip-off. We cannot disclose any details about our investigations (potential and ongoing).
Do you want to remain anonymous?
More information:
