An all-inclusive term referring to the numerous tasks involved in creating, updating and maintaining an active subscriber list and producing the mailing labels and necessary statistics and reports for auditing and marketing purposes. Fulfillment is accomplished either through an outside supplier a fulfillment bureau (also called a fulfillment house or fulfillment service) or internally, with purchased or self-developed software packages, hardware and an in-house staff. Each in-house and outside system or bureau has its own capabilities and specialties.