Prepaid mailers are used by customers as an alternative to personally delivering their film to a local dealer for subsequent transmittal to a laboratory for processing. After having purchased a mailer, the customer encloses a completed roll of film in it, prints a return address on the mailer flap in a blank that is labelled "YOUR ADDRESS," and mails the film to any of a number of Kodak laboratories provided in a map illustration. When Kodak receives the film, the film is processed, then returned by mail to the address which the customer provided.