Vouchers are commonly a pre-numbered form that is often used in account departments. They contain payable details for various employees in an organization and are processed through different means to make payments for concerned people. A Payment Voucher can standardize control of a department over its account section and it also avoids payment for a duplicate invoice. Payment voucher also acts a legal document that can be used as proof to ensure a legal transaction has taken place between two parties. It is used in diverse purpose and defined on basis of place where it is utilized. They are also considered as a receipt and play key role in cash transaction. An invoice that has been approved for payment is also indicated through payment voucher. Different samples and free templates on payment vouchers are available in the internet sites.