I bid on a job to change 253 fixtures in a office/warehouse. If I was to get the go ahead on a job such as this I was thinkin I should write up a contract stating the reqd work, price and payment terms and have the building owner sign it.Would this be normal practice?Would this help me if I had to sue for non payment? I was thinking of just adding this to the bottom of the quote sheet and having them sign off on it. I am unsure of the procedures but I want my company to look professional.