The same thing happened to me yesterday right after i got home from work, my bells rings and it's a woman from some company that supplies for PSE&G. She said she was offering customers a discount on their gas and electric. She ask to see a bill. She had a badge and a clip board with a copy of a bill on it as an example. I forgot the name of the company that she said she was from. When told her i didn't have a copy of my bill, she blew me off and knocked on my neighbors door.
All i wish is that someone would clarify what it going on. PSE&G should really post something letting ppl know which companies are legit and which are not. They need to take responsibility and accountability and try to protect consumers.