@darnell I've gotten a few over the last couple of months. I get the Informed Delivery by USPS's daily digest, so I just ignored them. When in doubt, I look at my daily digest or log in to the USPS dashboard.
Glad the scam is getting alerts, although, back a few weeks ago would have been better when people were sending and getting a lot of holiday packages.
Informed Delivery is great. You get images of the mail you are going to receive in the mail that day and heads up on packages. They have an app, also.