I have a very simple rule with my mum, who is 88 and still sharp, but not exactly up to speed with modern scamming techniques.
If anyone pretending to be the bank, investment broker, insurance salesman, the police, or anyone else wanting money calls, there is one answer “my son deals with all that, would you like his number?”. They all put the phone down at this point.
She was a bit sceptical about saying that to someone pretending to be the police, until I pointed out that if they really wanted her, they’d come round in a big van labelled police and stick her in a cage in the back.
The more they’ve put the phone down, the more she has realised the level of scamming going on. She has started to torment the Microsoft support scam artists by claiming she can’t remember where she left the computer “because she’s getting old”. She then takes them on a virtual tour of the house looking for it it....
The biggest problem is that the elderly don’t understand the technology at all. My old neighbour in London used to get terribly confused by voice menu systems when dealing with utility companies “they’re speaking to me but they don’t listen”. I caught my dad in the early 90s writing to the Barclaycard ‘Head of New Accounts” in reply to some spam he’d got, and he was politely declining the offer of a Barclaycard. He thought the bloke had written and signed the letter - he had no idea that it was spat out of the back of a printer along with 5 million others. He was no fool in that respect - on the board of a U.K. bank in the early 70s.