CA-ANG/SG used a USAF Sharepoint system to process packages until early 2018.
When you hit that page you will see a list of files. For each package, the wing uploads two PDF files:
- A 422 that is ready for my signature, and
- All the documentation needed to support my signature.
This system has worked very well for us, and I think it could indeed be a best practice. It is especially good at removing worries about Privacy Act issues that arise when email is used for moving packages back and forth.