Blossoming
Santander have said the Facebook message is probably fake. This doesn’t mean you shouldn’t be careful when receiving messages or letters claiming to be from your bank. I’m suspicious of all emails these days.
fullfact.org/online/santander-card-scam/
Not surprised, Blossoming, as there was something about the Facebook post which just didn't ring true to me. Clickbait, I suspect, as there's a lot of it about. As regards scams, they're so prevalent now that I'm reluctant to believe ANY emails/SMS/texts or even written correspondence these days without double checking directly with my bank. As for phone calls, no way, as most banks advise that they'd never contact you that way, and would certainly not ask for personal details or "arrange" transfers to allegedly safeguard your account. You can't be too careful.