Attorney Don Salom, and Attorney Sam Salom have the necessary abilities in contract drafting, negotiation, and review. This agreement stays in place for a year.I've never made a contract or been paid before, so I'm not quite sure how to draw up a contract. What should I include? A client signs the contract and pays the retainer without any changes or further negotiation of the terms of the contract. What is a Design Agreement? A design agreement is a legal agreement between two parties, typically between a designer or a design firm and another company. This Contract shall be for a period of Three Years beginning. This document outlines the terms of a design contract between a client and designer.