Subcontract and receipt of a complete invoice therefore. Learn the key differences between a Contract of Service and a Contract For Services.Understand their importance before entering agreements. One major difference between construction and service contracts is the level of complexity. Q: What is a PSC (Personal Services Contract)?. Service contracts are legally binding agreements between a service provider and a client that outline the specific services to be provided. The premier vehicle service agreement for new Mazda vehicles, the MPP Platinum VSA can help shield you and your Mazda from unanticipated repairs. A service contract is a legally binding agreement between a service provider and a client. The Wayne's Roofing contract offers a full range of roofing solutions to support members from conception through completion. You can create a service contract either manually or from a service contract quote.