What is Actio Bonae Fidei?

Legal Definition
A class of actions in which the judge might at the trini, ex officio, take into account any equitable circumstances that were presented to him affecting either of the parties to the action. 1 Spence, Eq. Jur. 218
-- Black's Law Dictionary
Legal Definition
Civil law. An action of good faith.
-- Bouviers Law Dictionary
Legal Definition
An action in good faith.
-- Ballentine's Law Dictionary