If it is , it's a good one , but I think it must be.
I used to have my mobile phone number on DS2's bank account but we changed that when he left school. (3 years ago)
Today I've had a text message saying account ending "1234" has gone into unauthorised overdraft today (Sunday?). It's not DS's account number and he says has checked his account and it's all in order. So I dismissed it as nonsense.
However I've just answered an automated call on the landline "an important message for DS full name" asking me to press 1 to continue. I didn't press it because that does feel like a scam, but they have his full name and two phone numbers that are/have been linked to his account.