Supplies Outlet accepts Visa, MasterCard, Discover and American Express. You can mail in a check with your order. And Supplies Outlet will also accept Official Purchase Orders from Schools, Universities, Local, City, State and Federal government agencies as well as large corporations(Fortune 500). P.O.'s can be sent by Fax, E-Mail or Regular Mail. Payment terms for P.O.'s will be Net 15 days from the invoice date.