[AlreadyRRich]

Never used one before, I know they're around. I've also heard some people who have the service have access to the direct API of the courier with an employee login info and they do it from their living room lol.

To be honest, as long as it's correctly done and it's shows on internal record, don't think you can beat such method.

Thats a lucrative business model right there.

Yep. Hypothetically speaking, I may or may not be able to get the API without too much problem. The issue is the credentials.
If anyone know how to SE someone's email and password, shiiiiit... let me know.