The Court of Appeal decision in Roberts v. Roberts (2015 ONCA 450 CanLII) states that the most basic obligation in a family law matter is the duty to disclose financial information. The court held that such requirement is immediate and ongoing. A failure to abide by this fundamental principle impedes the progress of the action, causes delay and generally acts to the disadvantage of the opposite party.
A a party who fails to provide financial disclosure as ordered by experience the court exercising its powers under Rule 1(8) of the Family Rules to make:
(a) an order for costs;
(b) an order dismissing a claim;
(c) an order striking out any application, answer, notice of motion, motion to change, response to motion to change, financial statement, affidavit, or any other document filed by a party;
(d) an order that all or part of a document that was required to be provided but was not, may not be used in the case;
(e) if the failure to obey was by a party, an order that the party is not entitled to any further order from the court unless the court orders otherwise;
(f) an order postponing the trial or any other step in the case; and
(g) on motion, a contempt order.
The power to strike out the pleadings is to be used sparingly and only in exceptional cases, where several orders for disclosure have been made.
http://www.canlii.org/en/on/onca/doc/2015/2015onca450/2015onca450.html