 A TPV provider allows companies to prove that a consumer agreed to almost any kind of sale or other transaction, using either email or telephone or both, and obtain a legally binding instrument in the process.TPV is required or authorized by the Federal Trade Commission and the Federal Communications Commission, and most state's Public Utility or Public Services Commissions for telecom service changes and by many states for changes in electric and natural gas service.In addition, the FTC requires a process similar to TPV for many orders and to have reliable documentation of their orders, and other transaction types.