It is "legal enough" to stuff whole sheets of stamps into a pouch and attach the pouch to a parcel, if you do it at the post office and have them cancel the sta

It is "legal enough" to stuff whole sheets of stamps into a pouch and attach the pouch to a parcel, if you do it at the post office and have them cancel the stamps at the counter. Let them know they can just use a Sharpie to cancel whole sheets at a time. Legal enough in the sense that my local post office lets me do it, and the local postmaster has okayed it, and the packages always make it, but I'm not entirely sure if it's 100% above-board. My record is over 800 stamps on a single Priority Mail box. Way, way more than would fit on the surface area of the box, and certainly way more than anyone could reasonably use if they actually had to apply the adhesive on the stamps.