Yes, breppp is completely incorrect. Faxes are used specifically because they can do transmission verification and document evidence of verified successful transmission.

Online fax services that are used by medical or government offices almost always generate digital logs that track when a document was sent, who sent it, and who received it, for regulatory purposes

I was talking about the receiving end and at least in the context of this story we are talking about a fax machine, not some fancy document server. Point being that a fax has too many failure modes, which is a feature in these places