SALT LAKE CITY (AP) – Rocky Mountain Power says scam artists are tricking its customers to reveal their credit card accounts. The utility says its Utah customers are getting fraudulent telephone calls claiming they are in default and at risk of losing power. Sometimes they tell people they forgot to sign a check. The callers are asking for credit card numbers to satisfy bills. Rocky Mountain Power says it doesn’t operate that way and warns people not to give up any of their personal information. The utility says it’s working with police to stop the fraud. Rocky Mountain Power says it never demands immediate payment for service or damaged or broken electrical equipment.