[mmarq]

My understanding is that when you transfer large sums (such as 30K) to an overseas account for the first time, the British bank is required to block it and ask you questions.

The first time I transferred money to an overseas account in my name, the bank blocked the transfer for a day until I gave them proof that I was the owner of the account, what I was doing with the money and that I wasn’t being scammed.

[csomar]

That's for account hacking and similar. In this case, the customers were buying "tech services" and at least not expecting to be scammed.

[maccard]

These are for personal bank accounts. Business banking is different.

[graemep]

Small business accounts are covered by the same rules.