(MSC News)--Westar Energy says scam phone calls are again being reported, with the energy supplier, in a press release, saying customers have reported receiving phone calls from someone claiming to work for Westar.

The release calls some of the impostors “very convincing,” adding that they may use websites that allow them to manipulate caller ID, making the call appear to come from Westar.

When the targeted customer calls the phone numbers provided, the person who answers sounds like they work for Westar, and speak with authority.

In some cases, callers may even provide information, like the amount due, adding credibility to the scam attempt.

The fake representative demands payment with a prepaid card, threatening that service will be terminated.

Westar says the calls are clearly a scam, and they should be reported to either 800-383-1183 or local law enforcement.