I have a complaint about a 0900 number

If you suspect that a 0900 number holder is not adhering to the rules, you should contact the Authority for Consumers and Markets (ACM). This is the government organization that oversees the use of these numbers.

For complaints, please use this form: https://www.acm.nl/nl/contact/tips-en-meldingen/uw-tip-of-melding-doorgeven-aan-acm/