You should not enter in to a marital settlement agreement until there has been full disclosure of the property and transactions made during the marriage.  You - or rather your attorney - will need to ask that the court allow you inquiry in to the business transactions made during the course of your marriage.  His business would have to be valued anyway for distribution purposes.  How the transactions are charcterized under the law - real estate fraud or what ever - is not relevant to you per se.  That needs to be determined.  But the information could be used as leverage in settlement discussions.  Get legal help here.  Good luck.