General Information: A non-approval number is provided when a review of a state or national criminal history record using the name and furnished descriptors of the buyer reveals one or more of the following circumstances:
�� Conviction of a felony in Wisconsin or a crime elsewhere that would be a felony if committed in Wisconsin or another jurisdiction and there is no record of a pardon.
�� Indication that the person was found not guilty of a felony in Wisconsin or a crime elsewhere that would be a felony in Wisconsin or another jurisdiction by reason of insanity or mental disease, defect or illness.
�� A recorded final disposition that does not indicate whether the conviction was for a felony or a misdemeanor and the arrest was for a felony in Wisconsin or a crime elsewhere that would be a felony in Wisconsin or another jurisdiction.
�� The Department of Justice is unable to determine whether an out-of-state arrest and/or conviction would be a felony in Wisconsin or another jurisdiction.
�� Adjudicated delinquent for an act committed on or after April 21, 1994, that if committed by an adult in Wisconsin would be a felony.
�� Involuntary commitment of any individual for treatment of mental illness, drug dependency or developmental disability.
�� Subject to a court order under the harassment injunction law (sec. 813.125) prohibiting the possession of a firearm.
�� Disqualified under Federal law.
�� Subject to a domestic abuse injunction or domestic abuse tribal injunction (sec. 813.12) or a child abuse injunction (sec. 813.122) prohibiting the possession of a firearm. [Note: This question applies to proceedings which were commenced on or after April 1, 1996.]

Quoted:
Something I found while poking around on the DOJ site...
http://www.doj.state.wi.us/dles/cib/forms/cib/FH4.pdf