USPS package alert texts are often scams that steal personal data through fake tracking links leading to convincing lookalike websites.
Unfortunately, I have not been able to find a USPS Web site which states this clearly, and so for the moment will refer to this Web page by another source (which has links to USPS Web pages which are no longer active ).
Gadget Review on MSN: That red dot on your USPS text? It's a scam waiting to steal your info
That red dot on your USPS text? It's a scam waiting to steal your info