[header] How to defend against intellectual property violation charges [title] Study the demand letter. [step] Usually, any claim that you are violating someone else's intellectual property rights will come in the form of a demand letter. This is sometimes also referred to as a " cease and desist " letter, if the remedy that is suggested is that you stop using whatever item of intellectual property it is. 
This letter may be written directly by the owner or by an attorney. [title] Determine what type of intellectual property is involved.