Yes there is verification. Sometimes the label WAS valid but it was purchased with stolen credit card OR purchased then refunded after delivery to the client but before it entered the postal stream.
EDIT: Remember, boxes can be dropped off before someone processes them. Just hand them random postal carrier OR put them in postal pickup box.
My suspicion is that these labels are entering the mailstream somehow circumventing the "first" scan.
https://www.freightwaves.com/news/nullship-selling-counterfe...
Here's the trajectory. Note that the final status has updated to no longer say "counterfeit" it's now just "postage assessment".
----- Delayed for postage assessment, Item in transit to destination
August 13, 2026 5:44 AM
Departed USPS Facility
JERSEY CITY NJ DISTRIBUTION CENTER
August 11, 2026 2:08 PM
Delayed for postage assessment, held awaiting payment
August 10, 2026 9:21 PM
Arrived at USPS Facility
JERSEY CITY NJ DISTRIBUTION CENTER
August 10, 2026 4:53 PM
In Transit to Next Facility
August 10, 2026 6:24 AM
In Transit to Next Facility
August 9, 2026 7:13 PM
Departed USPS Facility
MYTOWN DISTRIBUTION CENTER
August 9, 2026 8:18 AM
Arrived at USPS Facility
MYTOWN DISTRIBUTION CENTER
August 9, 2026 1:28 AM
Departed USPS Facility
MYTOWN DISTRIBUTION CENTER
August 8, 2026 10:30 AM
Delayed for postage assessment, held awaiting payment
August 7, 2026 6:29 PM
In Transit to Next Facility
August 7, 2026 9:14 AM
Arrived at USPS Facility
MYTOWN DISTRIBUTION CENTER
August 7, 2026 7:17 AM
In Transit to Next Facility
August 6, 2026 7:04 AM
In Transit to Next Facility
August 5, 2026 5:53 PM
Departed USPS Facility
OPA LOCKA FL DISTRIBUTION CENTER
August 5, 2026 4:46 AM
Arrived at USPS Facility
OPA LOCKA FL DISTRIBUTION CENTER
August 4, 2026 2:33 PM