My father repaired bakery equipment for this establishment a few days before he passed away. The customer gave him three different checks to be deposited one week apart from each other. The first check cleared, but the customer placed a stop payment on the last two, after he found out that my father had passed away. He claims the job was not completed, but my father never got a check before completion of the job. It's not a big amount, and my mom really needs the money (after 39 years of marriage and never worked her whole life). What should I do? The amount owned is within the requirements for small claims. Also, I just have an invoice of the work performed, and the cancelled checks.