Abstract: A new business form having integral therewith a mailing envelope, a customer statement, and a return envelope. The new business form includes an outer sheet having a releasable bisecting center line dividing the outer sheet into and forming thereby a first side and a second side, and an inner sheet which is secured to the first side along three edges thereof to form the return envelope. The second side is adapted to receive customer information and function as the customer statement. The outer sheet is folded on the bisecting center line and releasably attached along the outer edges of mating surfaces of the first side and the second side to form the mailing envelope. The improved business form may be one of a continuous series of improved business forms which are adapted for use on high speed data processing equipment.