Two sisters, the members of an LLC, applied for a loan, so are expected to guaranty. The first sister is a housewife, and relies on her husband's income. The lender pulls credit on her and her husband. He has a PFS signed by both which includes a statement that they are providing it for the purpose of guaranteeing credit and authorizing a credit report. Ultimately he did not require the husband to guaranty.
It seems he did not have a permissible purpose for the husband's credit report since he didn't require him to guaranty. On the other hand, he does have written authorization. Is this an FCRA violation?

Sounds more like a potential Reg B violation to me unless you are in a community property state.