a. Doing Business - continuity of commercial dealings incident to prosecution of purpose and object of the organization. Isolated, occasional or casual transactions do not amount to engaging in business. But where the isolated act is not incidental/casual but indicates the foreign corporation’s intention to do other business, said single act constitutes engaging in business in the Philippines
b. Instances when unlicensed foreign corporations can sue:
(1) isolated transactions
(2) action to protect good name, goodwill, and reputation of a foreign corporation
(3) contracts provide that Phil. Courts will be venue to controversies
(4) license subsequently granted enables foreign corporation to sue on contracts executed before the grant of the license
(5) recovery of misdelivered property
(6) where the unlicensed foreign corporation has a domestic corporation