STAMFORD, Conn.--(BUSINESS WIRE)--Basware, the leading provider of e-invoicing and purchase-to-pay solutions, today released guidelines to help companies reduce paper and increase green practices by automating key financial processes. At the same time, these guidelines help companies improve their finance operations and reduce costs. The global volume of bills and invoices is estimated to total a minimum of 500 billion annually, with 170 billion of these sent to business and governments, accord