Note to the person above who indicated that their carrier had said the package was delivered and signed for. Does your recipient live in an apartment complex? Check their office. This happened to me just recently--I mailed a package to my neice who lives in an apartment complex on Westheimer Blvd. I had a bad feeling when I mailed it, but did include her apartment number--it got to the apartment complex and sat in their office from sometime around the middle of March to something like the 10th of April......after I had agonized over it all that time, I swore that I would never use the USPS system again, especially for such a complicated address.