Is an agreement between a contractor and business set in stone once the signatures are added? Although all orders and payments must be carried out as specified, an amendment can be added, if certain changes must be made. Contractor order change forms are the necessary medium for listing out any additions or revisions to the original specifications. Ample space allows for detailed changes to be drawn up, and a signature line is added to the bottom. For clear company identification, customize your forms with a logo.