Can we forego the declaration of assets and listing our private and marital properties with some form of written agreement?

In California, the parties must exchange a current Income & Expense Declaration and a Schedule of Assets & Debts, along with a Declaration of Disclosure and a Declaration regarding the service upon the other party of the other three documents. The Declaration regarding Service must be filed with the court. Each party must have a complete understanding of the nature and extent of the community and separate property of the other before a knowing settlement can be entered into, otherwise, it could be set aside later.