In PeopleSoft, electronically entered invoices are required. Uniquely, when invoices are created from the Voucher Build process (self-service invoices), or loaded from other sources such as XML, the system obtains the origin for the voucher from the user ID of the user creating the invoice. In cases where no voucher origin can be obtained this way, the system obtains the voucher origin from the origin ID associated with the user running the Voucher Build process.  In the case of a duplicate invoice entry, the Voucher Build process puts duplicate invoices into the status "Recycled" wherein a duplicate invoice cannot be submitted.