A mailer is a product that is used to send transactional, informational or promotional data through the mail without the use of a traditional envelope. Mailers are generally produced as either self-mailers or continuous mailers. The self-mailer consists of a sheet of heavier weight stock that is folded to create a document suitable for mailing purposes. A continuous mailer is manufactured as a multiple part continuous form, collated together to create an outside envelope with internal inserts. The inserts may serve as order forms, statements, invoices, and return envelopes.