As more insurance companies convert to optically scanning your HCA-1500 claim forms, the need to mail them unfolded becomes increasingly important. When your claim forms are folded, you run the risk of them jamming the automatic scanning equipment which delays the processing of your claims. One way to prevent these delays is to mail your claim forms in our jumbo HCFA envelope. This "9 x 12 1/2" self-sealing window envelope holds up to 50 unfolded forms and is available with a window on either the right or left side, depending on your needs.