The card deck is a collection of business reply cards, usually in loose deck format, each containing an advertisement that recipient can complete and mail back (usually postage-paid) to an advertiser to receive a product, service, or additional information. Widely used for selling professional books or local services.
Card deck envelope formats include paper envelope, polybag, and silverfoil.
Sponsors of card packs will sometimes insert a card in the pack of a competitor in exchange for a like privilege in the competitor’s pack.
Synonyms: card pack