I was hired as a independent contractor on a courier service for the Red Cross. At first I was just relieving a person a couple days a week and getting paid through them. On the last two weeks of the contract the service had I ran completely for the guy cause he had school. I got paid for the first week of this by the guy above us through the guy I was running for previously. He made the check out to him and cashed it then I got the money from him. Now I contacted him told him that it needed to be mailed and changed to me for the last week. I did not receive payment last week and contacted him on Friday. He said that he sent the check but since it had not arrived he would put a stop on the check and send another one. I do not believe this and I am wondering if it does not come in in the next couple of days, what would be the best legal course of action for me to take. I can prove that I worked the week but wondering what I need to do exactly for proof that he has not paid in case I need to sue.