I am an unlicensed residential designer. License is not required for single family residential up to two floors. A client contracted with me to design a remodel. Because he was in a rush he pulled a demo and foundation repair permit and work commenced while I was designing. He cancelled the job right before I was supposed to pull the permit and now he doesn't want to pay because he says the job was not finished. Does the demo and foundation repair allow me to file a lien? Also, the lender wasn't notified of my contract. Do I have any danger of being sued for slander of title?