FACTS:

A contract of group life insurance was executed between petitioner Great Pacific Life Assurance Corporation (hereinafter Grepalife) and Development Bank of the Philippines (hereinafter DBP). Grepalife agreed to insure the lives of eligible housing loan mortgagors of DBP. 

On November 11, 1983, Dr. Wilfredo Leuterio, a physician and a housing debtor of DBP applied and granted by Grepalife of insurance to the extent of his DBP mortgage indebtedness amounting to eighty-six thousand, two hundred (P86,200.00) pesos. In 1984, Dr. Leuterio died due to massive cerebral hemorrhage. Grepalife denied the claims of DBP alleging that Dr. Leuterio was not physically healthy when he applied for insurance. Grepalife insisted that Dr. Leuterio did not disclose he had been suffering from hypertension, which caused his death. Allegedly, such non-disclosure constituted concealment that justified the denial of the claim.