Duplicating set CMS 1500 / HCFA 1500 claim forms. When you fill out the form, a copy is made on the second bottom sheet for you to keep for your files. The top sheet use to submit for payment is white. The duplicate carbonless copy underneath is yellow. These are individual separate sets and are not continuous forms that you have to tear apart. Both top and bottom sheets are printed OCR red both sides as required by CMS.