What is your SCAN sheet/ USPS Manifest form / End-of-day form experience?

Hi all, I’m sure plenty of us at some point have gotten the spiel from a USPS worker saying that we should bring in a manifest form or a scan sheet in order to condense all of our individual packages into one master barcode. I have no problem using it if I am fully protected to make both of our lives easier. My question is, have these worked for you in the past?

My concern is that, they will scan the manifest form and the status will only say ‘package scanned‘ / ‘package accepted’ instead of USPS in possession of item… I have also heard that scanning one master barcode can lead to issues if one package within that barcode gets lost, or is claimed as undelivered by an A-to-Z claim on the buyers behalf. Have heard that I will not be covered by the Amazon buy Shipping claims protected badge as well (potentially). If anyone could please share their experience with the scan form/manifest forms that would be excellent. open to any advice or precautions against using them as well. would also really appreciate any anyone who has worked at USPS weighing in on this matter. Thanks!