The Dutch regulator has released details of five fines - which have all been appealed against - totalling more than €26m that it handed out in December.
The Kansspelautoriteit notes that Videoslots – which has publicly contested its €9.8m fine – as well as N1 Interactive, Probe Investments, Betpoint Group and Fairload have all lodged appeals against their sanctions.
The KSA says the five parties illegally allowed players in the Netherlands to participate in online casino games without a licence.
After the fines were announced to the providers in December, the five parties asked a court to stop the publication of the decisions, a motion which a judge rejected last week.
The KSA states that N1 Interactive’s €12.6m fine concerned a repeat violation for which it had already been fined.
The KSA says Videoslots incorrectly displayed the regulator’s logo on its website. Videslots last week said it would challenge the fine.
Elsewhere, the KSA says other failings included the lack of visible and adequate age verification, wrongly suggesting that products are offered with a European licence and allowing the use of anonymous payment methods.