Obligatory Qadha Fast and Kaffarah
1667. In the following situations, both qadha and Kaffarah become obligatory, provided these acts are committed intentionally, voluntarily and without any force or pressure, during the fasts of Ramadhan:
And as a recommended precaution, invalidating the fast due to reasons other than those mentioned above, should also be recompensed with Kaffarah, besides the obligatory qadha.
1668. If a person commits any of the foregoing acts with an absolute certitude that it does not invalidate fast, Kaffarah will not be obligatory on him.