Form LCD811 / 100 Forms LCD-811 This form is a single 8.5 x 11 sheet. Included on this sheet are the PS Form 3800 mail receipt (for in-house record and proof of mailing), the PS Form 3811 return receipt card (for signature capture at point of an internal audit label (which displays miscellaneous information about the mail piece), an optional label which can be another address label, delivery), dynamically printed Certified Mail barcode, address label, a sender label, or an internal audit label.