What to do if you are being sued?

Your first action should be to consult an attorney. They will know how to answer the accusations in the most effective manner. An attorney in your jurisdiction is going to be the best position to protect your rights and assets.

You should do so very quickly. Often, you only have 20-30 days after being served (receiving notice of the suit) to answer. If you do not, it is a default, or the other side wins by forfeit.