I just got a call, allegedly from Visa, saying I had a suspicious transaction amount of $600 charged to my VISA via a Western Union. The caller had a strong, typical East Asian accent with an enormous number of calls going on in the background (too loud for a professional call centre IMHO). They wanted me to confirm that it wasn't my charge by repeatedly asking for a direct answer then asking me to put my phone on speaker saying something about me being behind a foreign VPN? I hung up then because it was too weird. Any idea what the hell they hoped to achieve by me putting my phone on speaker and the VPN talk?
EDIT: I forgot an Important part: THEY ADDRESSED ME BY NAME.
make it sound "authentic" by bamboozling with techno-garble. - so you're like "OMG they can see all this stuff, it must be real".