California Attorney General just sent me an email because 1 guy complained that the software I sell is missing something. SO they sent me a letter to my po box saying that I should respond to his complaint, that they need a response from me in 15 days or they "may" consider legal action etc. The transaction amount is only $40. What should I do? Shut down my po box, respond with a letter? What? I person got his money back and a free update to the software, is this anything I should be worried about? Thank you.