Everything downstream depends on that distinction holding. Submission, invoice, payment and dispute all rest on whether the business can tell the difference between work somebody says happened and work it can prove happened.
Most systems collapse the two the moment a driver marks a job done. The Delivery Desk keeps them apart and makes the gap visible: this job is claimed, that one is evidenced, and here is precisely what is missing from the first.
It is also why the product refuses. It will not prepare a client submission, and it will not call a delivery invoice-ready, on evidence that does not meet that client’s requirements. An owner in a low-trust environment needs software that declines, not software that is confident.