NOTE OF THE APOSTOLIC PENITENTIARY ON THE IMPORTANCE OF THE INTERNAL FORUM AND THE INVIOLABILITY OF THE SACRAMENTAL SEAL ... The doctrine also helped to further specify the content of the sacramental seal, which includes “all the sins of both the penitent and others known from the penitent’s confession, both mortal and venial, both occult and public, as manifested with regard to absolution and therefore known to the confessor by virtue of sacramental knowledge”. ... the sacramental seal manages to bind the confessor also “interiorly”, to the point that he is forbidden to remember voluntarily the confession and he is obliged to suppress any involuntary recollection of it .