Boston Police report  scamsters are calling Bostonians, demanding money right away to to replace meters that could burst into flames or something or to make up allegedly delinquent accounts.
Police say if somebody purporting to be from National Grid demands you buy a pre-paid card to keep your electricity on, don't do it. The company would replace any defective meters for free. Also:
National Grid does contact customers with past due balances by phone to offer payment options, but never demands direct payment over the telephone.
Ed. note: Plus, there's the fact that National Grid doesn't offer electric services in Boston ...