I presume your wife was a divorcee at the time of your marriage and you are insisting on her to show her divorce papers to you. If your wife had not taken divorce from her first marriage and had married you without telling about her 1st marriage then your marriage is null & void and you need not take any divorce from her and part ways. When a spouse is still alive and when the couple have not got the decree of divorce it is illegal to marry somebody else. You can also file cheating case against her