Applicant flunked the background check–must we provide her with specifics?

Q: North Dakota is an at-will state. I had an administrative assistant work for us for one day. and we opted to terminate her due to her background check and her providing false information on her résumé. Can I advise her that not keeping her employed was due to criminal and credit items on the background check? She says she is entitled to a copy of the background check or our findings, but I didn't think I needed to provide that?  – Kim, North Dakota