You work with a colleague who has been working under an expired

Subject: Business    / Management
Question
You work with a colleague who has been working under an expired certification or license in a field where it is a requirement to have it. You have discussed your concern with your colleague. What is your best course of action? (Points : 11)
Discourage clientele from working with your colleague.

Contact the state certification or licensing board.

Continue working with your colleague and leave the situation alone.

Resign from your position.