What is the ruling on working as an accountant, marketer, or sales employee in a company that changes the country of origin of its goods from Chinese to Italian, knowing that some customers sell them as Italian?

If most of the company's tools are counterfeit, with the country of origin changed, then it is not permissible to work there, due to the assistance in or approval of fraud involved. However, if fraud is not the predominant practice, then the basic ruling is that it is permissible to work, provided that the employee does not directly engage in fraud and that he advises the company's management and prohibits them from this wrongdoing.