I posed the question as the FAX machine wasn't answering, but now I have succeeded by using a program called PAMFAX I have completed this process before successfully, the only down side is that you need to scan your document before sending it as opposed to feeding it into a dedicated FAX machine, it cost me 79p UK. You need to add credit to begin, I haven't used this for over a year and my credit was e activated instantly. I expect they might accept a phone call after you send your request if you are particularly sensitive about card details, but probably no less secure than sending it in the international post, or you could request they call you.
MB.