This kind of happens in smaller areas. The ballots are pretty identifiable. They are culled out, stamped, and put right in the route for town hall.
But, now that local mail has to go to the big centers, this would be against the rules.
I see the USPS is practicing for the election.
Package shipped from Tampa ...
here’s the log on it ...
Ship To DADE CITY, FL, 33523, US
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Date Location Activity
08/31/2020 4:40 P.M. San Juan, PR, United States Package processed by post office
08/31/2020 11:58 A.M. San Juan, PR, United States Package processed by post office
08/18/2020 7:14 A.M. Dade City, FL, United States Shipment Acceptance at Post Office
08/15/2020 10:55 A.M. Orlando, FL, United States Package departed UPS Mail Innovations facility enroute to USPS for induction
08/14/2020 10:00 P.M. Orlando, FL, United States Package processed by UPS Mail Innovations origin facility
08/14/2020 9:04 P.M. Orlando, FL, United States Package received for processing by UPS Mail Innovations
08/14/2020 8:30 P.M. Tampa, FL, United States Shipment tendered to UPS Mail Innovations
If only someone there had a brain.