This is pulled from the Curaçao eGaming licencing page on its website:
"Anti-Fraud
Don’t fall victim to online financial and identity fraud schemes by providers of services claiming to offer our Curaçao eGaming IP licensing and operators of websites claiming to be duly licensed by Curaçao eGaming
How to validate?
Look for the Curaçao eGaming logo in the footer
All websites compliant with Curaçao eGaming need to have the Curaçao eGaming logo installed in their footer. Please take note of the different seal statuses representing the Operator’s compliance status:
Curacao Shields Preview
Review the validation page
The logo in the footer needs to link to a validation page on the
https://validator.curacao-egaming.com domain
Cross check the company information
The company operating the website needs to match both in the website terms and conditions and in the validation page"
And in fact, there's a link on that same page to report violators like you. Not sure sure anyone want to go that far but be warned. You could get your company in big trouble for false claims.
Exactly this is the best way to validate and how to check a gambling website. I don't think any players would play on this casino they should not be trusted in anyway.