I had a relative who, having lost his wife, got involved in a dating scam. No matter how many times I warned him he wouldn't listen. Then, one day I asked him to check a certain website on the internet which he did. The website contained many different descriptions of online scans, one fitting his situation perfectly. They had only managed to extract a small amount of money from him at this point, so he was saved from the worst.
The thing is, he lives in Thailand & comes to Canada occasionally to visit. The bank did warn him, even telling him they would not discuss this on the phone but that they must speak to him directly.He did see them & at first did not believe their warnings.
I've always had a rule - I live alone & anyone, other than known family members (who never ask), requesting money from me, gets a wide berth.