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Yes, it may. While the spouse is not required to sign a deed/mortgage a purchase in Wisconsin, the lender will likely want to have her sign a release (quitclaim deed, actually) stating that she has no interest in the property, and/or, gives all her possible interest away.
This way, she cannot have a claim to the property in the divorce.
While only a precaution, until/unless the divorce is finalized, most lenders would require this.
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