These people called my Mum today claiming to be from the fraud department in HSBC
The number they called from or spoofed is 03456081878
When I look up the number it shows up a lot of the official hsbc websites, such as here were it appears in an example text message image: Received A Text? | Bank Scam Texts - HSBC UK
I know this is not a sure way to tell but it can be a indicator of authenticity; Mum said they sounded professional.
It sounds a lot like a scam to me but it’s a little more difficult to tell than others because of the above reasons, also there are people claming it is real / verified on phone number checker websites.
The scammers most likely spoofed it if it’s a scam, your mum should actually just call proper HSBC and speak to them not from that number ideally a different one.
You can trust a number when it is posted on an official website, such as the one you posted. On that very same website, they tell you what numbers they use for Fraud Alerts:
Scam alert
The numbers below are the only ones that HSBC’s fraud team will ever ask you to call. Any other number you’re asked to call will NOT be our fraud team.
They also tell you to call the number on the back of the card if you feel uncertain. I agree, the number might have been spoofed if they were trying to scam your mum, but you did not say what they originally wanted. It is common for banks to ask some sort of verification, so they know it is the actual account holder.
Correct.
I haven’t yet used HSBC but I do use the British banking system.
It’s not rare that they do extensive research on the caller.
I got roasted by my bank last week for a bank trasfer.
Best off calling the number at the back of the card