[mothered]

That may be the case, but companies that are not amazon only give you the return address and require you to post it back to them, also requiring you to have some form of tracking and proof.

If that is returned that way, then liability will be on the person returning it rather than the company, in the same way that we pin it on the company when we dna..

It's not possible to generalize for each and every company. The first port of call, Is to research their terms to establish who's responsible for loss of goods during shipment.

That aside, there seems to be a conflict of Information, so I'm trying to clarify the exact method you're Intending to use.