from
Bouvier's Law Dictionary, Revised 6th Ed (1856)
IN FORO CONSCIENTIAE. Before the tribunal of conscience; conscientiously.
This term is applied in opposition, to the obligations which the law
enforces.
2. In the sale of property, for example, the concealment of facts by
the vendee which may enhance the price, is wrong in foro conscientiae, but
there is no legal obligation on the part of the vendee to disclose them, and
the contract will be good if not vitiated by fraud. Poth. Vent. part 2, c.
2, n. 233; 2 Wheat. 185, note c. 20