Im a Lawn and Landscaping company owner, and recently had a customer accept my bid for her property. So i collected half down for materials like normal and got the materials, Completed the job, And everything in the scope of work, And the customer is now demanding extra materials not listed in the contract. Now she is refusing to pay for the completed work! I believe since she is doing this that she had no intent to pay for the labor when the job is completed meaning the other 50% down, My question is; Is this considered "Theft of services" in Iowa? and can i just file a report at the local police department for it?