Garcia and her former husband mortgaged their home and executed it in favor of National Australia Bank Ltd; The appellant signed a guarantee in favor of the Bank securing the debts of the company of her former husband; The parties dissolved their marriage and there was a failure in the business of her husband ; Bank demanded guarantees on the failure of the business, the appellant claimed equitable relief against the contract; National Australia Bank ltd v G arcia (1998 ) 194 CLR 395 The trial court ruled