My friend got a call from 'the electric company' - they were going to turn off the power to his restaurant that had been open for about 5 weeks, because he hadn't paid the bill or some deposit or something - this call came in at about 1130 on a Friday morning (right before the lunch rush), while he and I were sitting at another restaurant - they told him to go buy a prepaid Visa card and call them back, or the truck was going to get there and turn him off.
Didn't make sense to pay with a prepaid card - didn't pass the 'smell' test - the owner of the restaurant we were having lunch at said, "Yeah - we got a call like that a while back - it's a scam!" - turns out, this is a really common scam:
