Shipping companies like FedEx, UPS, DHL, and the U.S. Postal Service only accept boxes and packages that will make the journey safely. They do not accept paper wrapped boxes. If the paper gets caught on something, it can cause other packages to collide, and the paper will eventually be ripped off the package. This can result in the package and the paper with the mailing address never meeting again. We recommend avoiding this problem by not wrapping your boxes in paper.