It used to be the case that your accounts system would have a postal address for a supplier, probably with some control management procedures to cover set-up and changes. Payments were made by printing out a piece of paper and posting it to that address. The supplier took the piece of paper to their bank to arrange for a credit transfer.
Of course this was far too cumbersome to continue into the C21st. We need something much slicker, otherwise we'd be taking the bread out of the mouths of children of fraudsters like this. That would be unacceptable.