It was !!! Thanks for posting this, my package was outside waiting for me :)

Oh, so the wage slave Prime couriers do carry delivery notices, like every other doorstep courier in existence, which means Amazon does not need to pester consignees with rapid-fire phone calls.

I'll block whatever I please, thanks, including callers spoofing allegedly "safe" numbers. I can just see the South Asian crooks getting hold of this and claiming the courier needs a "processing fee" prior to delivery.

Sometimes they have trouble locating the delivery address.  Like the package I received today.  I live in a large and quite confusing apartment complex with poorly marked buildings.  If I had ignored this call, my package would have been returned to the warehouse.  Luckily the third time the driver called I answered and got my package on time.  Not everyone in the World is out to dupe you.

...however, many scammers do spoof numbers, so there's that to take into consideration as well...