Don't fall into these trademark and copyright traps. Opinions expressed by Entrepreneur contributors are their own. Receiving a cease-and-desist letter or, worse, having a complaint filed against you in court, is never a welcome occurrence. Multiple resources must be diverted away from your business and toward resolving the dispute or rebranding. A modest investment in intellectual property (IP) diligence work before launching a website can help you avoid the following common pitfalls.