A promissory note is a written promise to pay a debt. It is an unconditional promise to pay on demand or at a fixed or determined future time a particular sum of money to or to the order of a specified person or to the bearer.
A Complaint is a document filed with the court or other authority by a person or entity claiming legal rights against another. The party filing the complaint is usually called the plaintiff and the party against whom the complaint is filed is called the defendant or defendants. Complaints must properly state the factual as well as legal basis for the claim. A complaint also must follow statutory requirements, which vary by jurisdiction. When the complaint is filed, a copy of the complaint and the summons must be served on a defendant before a response is required.