I follow the American Tarot Association's Guidelines for ethical readings: 

"As an ethical Tarot reader, I help others to better hear their own inner guides. I empower clients to think through their options and come to decisions on their own. I remind clients that, whichever direction the cards may point, the future really lays in the hands of each individual. If necessary, I will encourage clients to seek the professional help of doctors, counselors, accountants, and lawyers — especially in cases where the client’s concern goes beyond my field of expertise. I do not use the cards to identify “curses” or “bad energy” and then charge my clients fees for removing these negative entities. All my professional actions are offered in the service of health and wholeness."