This is actually a very popular way of scamming people especially the older ones who are more susceptible with the trick as they are less tech-savvy compared to the younger generation. One big lesson is never trusting anyone who called you for anything most especially related to your finances because these days legit firms are not usually calling their customers. For people who can be interested with this scam, one can watch many videos in YouTube to gain more insights and there are also many funny ones where the scammers are the ones victimized...turning the table around, so to speak.