SCAM ALERT:  You may receive a call whose caller ID says Pepco saying that you service is going to be disconnected.  They may know a lot of information about you.  They may say that though your account shows as paid, but there is a deeper issue in their system.  The only way to stop the disconnection is to pay them via some sort of express cash card, while they would investigate the issue.  They will offer to refund you and offer 30 days free service.  They come across as pretty convincing and persistent, even calling back if you get disconnected.  This is a scam.  Pepco is aware of it.