I wouldn't even know how to go about tipping my delivery person(s). I started home delivery of a newspaper last fall and the service got pretty bad right after the holidays (the paper is now consistently halfway down the lawn rather than on the covered front porch, where it was ending up consistently before Dec 2016). I'd be happy to tip, but the billing and payment is all handled online, and this is a person I've literally never laid eyes on. Parcel delivery suffers from the same problem. I'm a heavy user of Amazon, but never present when UPS comes.