Abstract: The multi-ply business form set includes first and second plies having first and second sections separable along a transversely extending line of perforations. The first section has information blocks to comprise an original invoice and a file copy. The second section is divided into two parts, separable each from the other and from the first section. The first part has a card portion which extends transversely a distance less than the width of the form set. The second part includes an envelope formed by gluing the first and second plies one to the other along the margins defining the envelope. The envelope portion extends transversely a distance greater than the card portion but less than the width of the form set. Upon separation of the two parts from the first section and from each other and discarding the stubs of the remaining parts, the card may be disposed in the envelope, for example, for use as a card accompanying a delivery of flowers.