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How to change your name with NorthWestern Energy
Married or divorced and updating your accounts? Here's how NorthWestern Energy takes a name change, from its own help page.
In person or by phone only. NorthWestern Energy is one of the few that won't change your name online. Call 888-467-2669 or visit, and bring your documents.
NorthWestern Energy's steps
NorthWestern Energy doesn't post online steps for a name change. Call customer service: Montana 888-467-2669, South Dakota and Nebraska 800-245-6977.
Have these ready
- A copy of your marriage certificate, divorce decree or court order (most companies ask for one).
- Your updated driver's license or ID, if you have it. Social Security comes first, then the DMV.
- Your account number, and the name the account is in now.
Let Sasha handle the letters
Sasha writes and signs your name change letter for NorthWestern Energy and every other company on your list, with your certificate attached. It also keeps track of who's done. The checklist is free.
Checked against NorthWestern Energy's own page in October 2026. Companies change their process; confirm on their site or by phone before you send anything. Sasha isn't affiliated with NorthWestern Energy.