It’s an extremely difficult problem to deal with because there is no dispute mechanism in the faster payment flow, and Faster Payments are not interested in adding one. As a consequence, once the payment is authorise, the moneys gone, and getting back is almost impossible.

Fraudsters have been taking huge advantage of this, and regulators are demanding that banks protect customers from these scams, or eat the cost of reimbursement.

Having worked on this specific problem, I can say that calling the customer for authentication is one of the most effective ways to prevent these scams. The call normally forces the customer to hang up on the scammer, which is incredibly powerful because it removes the primary source of pressure on the customer, and gives them space to think. Most customers then realise they’re being scammed, and stop there.

You may say that there’s other ways of warning customers, like in app notifications etc. Well I’ve tired all that, they’re not effective, regardless of how big, scary and red you make them. Even when tuned so the false positive rate is almost zero, so most customers only every see them when they’re actually about to be scammed, they still don’t work. Reason why they’re not effective, customer mentions what they see to the scammer on the phone, scammer explains it away and pressures the customer to continue.

This isn’t to say there isn’t some better balance, or that the banks aren’t being lazy. But the fraud question is serious one, and a very difficult one to answer. Simply ignoring it when discussing Open Banking is either naive, or intellectually dishonest (I’m not claiming that you’re intellectually dishonest, but there are plenty of people who like to gloss over the fraud issues, or just victim blame).