You can order PS Form 3849 through the U.S. Postal Service eBuy2 Ordering System under the MDC eBuy2 catalog or the Touch Tone Order Entry (TTOE) system. n If you already have a 10-digit access code for TTOE, please call 800-273-1509 to place your order. Search for this item by using the PSIN or the PSN noted below.