You can file singly. However, in my experience it is advantageous to file jointly. For example, you say your debts are pre-marriage. If you file a bankruptcy, you are required to list every debt. You cannot pick and choose. If any of your post-marriage debts are joint, your liability will be discharged but your wife will still be liable. Please talk to an experienced bankruptcy attorney who can help you sort this out.
Answered on Sep 03rd, 2011 at 7:07 PM