NorthWestern Energy is again warning customers about a scam involving the collection of overdue utility bills.

A number of customers around our service area have reported receiving suspicious telephone calls in recent days. Although this activity has been reported for several years, it is once again making the rounds across our region. The latest variation on the theme involves the scammers saying that customers’ last payment posted to the wrong account and that a new payment has to be made with the promise of a future refund.

The scammers can be very convincing and often use "spoofing" technology that makes it appear that the call is coming from NorthWestern Energy.

NorthWestern reminds customers to be vigilant when it comes to anyone seeking payment information on utility bills, either in person or via the telephone or internet.

NorthWestern provides several past-due notices before terminating service. If you get a cancellation notification, always verify it by dialing the customer service number on your utility bill or in your local phone directory. NorthWestern never asks customers to use a prepaid debit card for payment.

Customers with questions or concerns about potential scams should contact NorthWestern Energy to report concerns or questionable calls. Montana customers can contact NorthWestern at (888) 467-2669. In Nebraska and South Dakota, customers should call (800) 245-6977.

Customers who have received a scam attempt are also asked to file a complaint with the Federal Trade Commission at 1-877-382-4357 as it can help the agency build a case and perhaps implement safeguards to prevent future scams.

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About NorthWestern Energy (NYSE: NWE)

NorthWestern Energy provides electricity and natural gas in the Upper Midwest and Northwest, serving approximately 701,000 customers in Montana, South Dakota and Nebraska. More information on NorthWestern Energy is available on the company’s website at http://www.northwesternenergy.com.