You can formalize this working relationship with this document, for example. B the respective responsibilities, how the payment is made and other important details. One of the advantages of this type of partnership is that commitments and responsibilities are clearly highlighted and no individual contractor is less invested in the project, as is sometimes the case when a subcontractor is hired to carry out parts of a project. You can use a bid agreement joint to describe the specific parameters of your partnership, so you can work together on a project that you may miss if you offer alone. Other names for this document: Team Agreement. . . .