Yesterday I received a package by regular U.S. mail containing an item I'd ordered online.
When I examined and opened my package, I discovered that someone had illegally opened my package and added this card, then retaped the box closed again.
Nearly all of our personal (i.e., non-junk) mail arrives having clearly been illegally opened by someone, and the contents are often tampered with. Sometimes the outsides are left hanging wide open (meaning the perpetrator/s have no fear of being prosecuted?). Other times, the outsides are crudely taped or glued shut, occasionally with so much glue that the contents are actually glued into the envelope or package!
As stated here previously, I have complained to the USPS REPEATEDLY about the constant illegal tampering and frequent theft of our mail. At one point, an investigator contacted me and had me fax him copies of some of my many receipts for missing/stolen mail, which I did. (I have a stack of these over an inch thick! Many of these are for missing job applications, and some are for missing formal complaints; some are even for certified mail.)
The investigator later called me back and said he was "referring the matter back to my local post office". I tried to explain that the problem WAS my local post office, and he said there was nothing he could do.
Meanwhile, my former mother-in-law, her friends, and other unauthorized persons are seen coming and going frequently from supposedly secure areas of our local U. S. government facility...