I'm not even clear what the first line is saying. Packages undelivered by.. them? other drivers? How? If it's by another driver, how do they get it, and how do they know it's not delivered? If it's their own package, wait, they're literally paying drivers not to deliver my packages? What in the actual hell.
AFAICT (from googling), it's actually for returning undeliverable packages (no access, etc), and it sounds like resorting to this regularly it will reflect negatively on your job status.
Maybe it was intended for the case when someone orders a bunch of stuff from Amazon, but then goes on vacation before it's delivered. Then when a driver notices that yesterday's delivery hasn't been collected yet, it might be for the best to take it back and try again a few days later.
