In some States a minor can be treated as an adult when it comes to a deposit account. A quick search in the Wisconsin statutes did not locate such a provision, but I am not that familiar with Wisconsin law.
An adult can open an account, but it will be the adult's account, not the minor's. In order to preserve the minor's money separate from the adult's it would have to be in a UTMA or under some other official custodian relationship. But those accounts have specific requirements and ramifications and should only be opened by a parent after consultation with a financial planner and/or an attorney. Not through any advice offered by a financial institution.
I see a lot of banks that have accounts titled such as Joe Kid, minor by Joe's Mother. There is no legal basis for such an account in any State of which I am aware.
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