Open Question: Help please --- liability question?

Can anyone tell me what type of liability should I be looking into? Thank you. Aker has been Potter’s sales agent for twenty years and has dealt with about 200 customers during that time. In 2008 Potter fires Aker, terminating the agency. None of the 200 customers have heard about the termination. What steps must Potter take to protect himself from potential liability from customers and Aker?