Discovery in a family law case is essential in order to determine the nature and value of the marital estate. The parties’ mutual exchange of basic financial information is mandated by the Supplemental Rules of the Probate and Family Court, Rules 401 and 410. Financial statements, which detail the parties’ income, expenses, assets and debts, must be exchanged within forty-five (45) days of the service of the summons in the action. In addition, the parties must produce documents for the past three years, including but not limited to tax returns, paystubs, bank statements, retirement account statements, and loan/mortgage applications. The rules reflect the fact that spouses have a fiduciary duty to each other. Further discovery may be necessary and proceeds upon formal request to the other party.