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Ahh, it’s a business account and not a personal one.

Even so, it doesn’t add up. You’re saying anyone can just fax transfer orders to your bank if they know your account number without including any authentication information of any type? And you’re OK with this?

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Signature has to match and they do call you to confirm, but your are right that there is no cryptograpgic security, its all judgement call by meat

Well the call back to confirm is an appropriate layer of security (2fa?) I guess. So a more accurate version of the original comment might be “some business accounts can fax requests to their bank, which they then confirm via telephone before doing it”

fwiw, it probably depends on the bank and the customer. I used to work for a large insurance company in London. There I could (and did) authorise 6 digit transfers to new accounts with just a fax with the (perpetually busy) directors signature. One time the bank made a mistake, and one simple phonecall from me was all it took to resolve (with no verification of who I was - unless they did some callerid check?). The level of customer service was astonishing to me, but that account was probably worth it to the bank to eat any fraud until it got too serious.

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