What's the best treat for Ethical violations?

This will depend on the rules of procedure of the company and the degree of the severity of the violation

You must ensure compliance with the action rules and values which operate as standards in society,

You must ensure the compliance with the regulation

You have to take repressive measures in case of violation of rules

Apply disciplinary measures 

Punish severely those who do not respect the rules

Impose sanctions for persons committing violations depending on the type of fault