This happens frequently with US Postal Service. They state a package is delivered, but the receiver did not actually receive it. Usually the package ends up being delivered later in the day or the following day. Sometimes it’s been delivered with a neighbor, so please check. If a a day or two passes and there is no sign of the package, please go to your local postal office and have them investigate the missing package.  The good news is; most packages end up in the right hands!