The most popular of contractor forms, an invoice is the type of document through which a contractor may bill a company or individual for the services that they have provided. Normally, this will list the precise flat-fee rate or hourly rate charges along with the list of services that were provided. Additionally, the invoice will include additional information as far as the terms of payment are concerned. For instance, it may say the recipient needs to pay some amount in some amount of days, and it can also list what methods are acceptable. It is important to note that this form exists because contractors are not employees, which means they do not automatically receive payment from a payroll system. Instead, they are freelance, independent workers. The submitted invoice is required in order to receive payment for a service the contractor has offered. For example, the contractor might bill a client for having provided a service as an electrician, freelance writer, builder or plumber. The information that is included on this contractor form will ultimately depend on the service that they have provided. Typically, it will at least include the name of the business or the name of the contractor along with the phone number and address through which he may be contacted. Some may also include their email address. Often, there will also be company information and contact details for the person who will be paying the invoice. The type of services applied will also affect what entries are on the invoice. For instance, a contractor in the construction business may have entries for labor and supplies on the invoice. Supplies may not be present on a freelance writer invoice, though hourly or flat-rate fees may have blank spots instead. There may also be a blank section for both if the contractor sometimes charges hourly rates but also charges a flat rate. Finally, there may be entries for special fees and tax charges on the contractor form. The contractor invoice will also often include information with regard to when the invoice was generated and at what time the money is due. For example, it could list the date when the contractor created the invoice and at which time the client is required to pay the fee. Additional payment terms may be on the invoice, such as the contractor requiring the invoice be due upon receipt or within a certain number of days.