Black Hills energy is warning customers of a scam so you don't fall for it.
The company says customers are being told that they are past due on their account, and without immediate payment, their services will be shut off.
If your account is at risk of service disconnection or you’re due a refund, the company will issue advance written notices by mail.
"Perpetrators are becoming more sophisticated, manipulating caller ID or leaving a call-back number with a recording that mimics a utility’s phone system message and options."
Company officials urges customers with concerns about the identity of someone claiming to represent the company to call Black Hills Energy’s 24-hour emergency line at 800-694-8989 to verify employment.