Original sentence: An internally authorized Purchase requisition is normally converted into a PO.From an internal control perspective, Purchase Orders are the end result of an authorization process that is traditionally triggered by the creation of a Purchase requisition.POs usually specify terms of payment, incoterms for liability and freight responsibility required delivery date, and specifications and reference or part numbers of the items to be purchased, with quantities and prices.When accepted by the seller, it forms an agreement between the buyer and seller