I answer that, As stated above (Q. 33, AA. 6, 7; Q. 67, A. 3, ad 2), the difference between denunciation and accusation is that in denunciation we aim at a brother's amendment, whereas in accusation we intend the punishment of his crime. Now the punishments of this life are sought, not for their own sake, because this is not the final time of retribution, but in their character of medicine, conducing either to the amendment of the sinner, or to the good of the commonwealth whose calm is ensured by the punishment of evil-doers. The former of these is intended in denunciation, as stated, whereas the second regards properly accusation. Hence in the case of a crime that conduces to the injury of the commonwealth, a man is bound to accusation, provided he can offer sufficient proof, since it is the accuser's duty to prove: as, for example, when anyone's sin conduces to the bodily or spiritual corruption of the community. If, however, the sin be not such as to affect the community, or if he cannot offer sufficient proof, a man is not bound to attempt to accuse, since no man is bound to do what he cannot duly accomplish.
Reply Obj. 1: Nothing prevents a man being debarred by sin from doing what men are under an obligation to do: for instance from meriting eternal life, and from receiving the sacraments of the Church. Nor does a man profit by this: indeed it is a most grievous fault to fail to do what one is bound to do, since virtuous acts are perfections of man.
Reply Obj. 2: Subjects are debarred from accusing their superiors, "if it is not the affection of charity but their own wickedness that leads them to defame and disparage the conduct of their superiors" [*Append. Grat. ad can. Sunt nonnulli, caus. ii, qu. 7]—or again if the subject who wishes to accuse his superior is himself guilty of crime [*Decret. II, qu. vii, can. Praesumunt.]. Otherwise, provided they be in other respects qualified to accuse, it is lawful for subjects to accuse their superiors out of charity.
Reply Obj. 3: It is contrary to fidelity to make known secrets to the injury of a person; but not if they be revealed for the good of the community, which should always be preferred to a private good. Hence it is unlawful to receive any secret in detriment to the common good: and yet a thing is scarcely a secret when there are sufficient witnesses to prove it. _______________________
SECOND ARTICLE [II-II, Q. 68, Art. 2]
Whether It Is Necessary for the Accusation to Be Made in Writing?
Objection 1: It would seem unnecessary for the accusation to be made in writing. For writing was devised as an aid to the human memory of the past. But an accusation is made in the present. Therefore the accusation needs not to be made in writing.
Obj. 2: Further, it is laid down (Decret. II, qu. viii, can. Per scripta) that "no man may accuse or be accused in his absence." Now writing seems to be useful in the fact that it is a means of notifying something to one who is absent, as Augustine declares (De Trin. x, 1). Therefore the accusation need not be in writing: and all the more that the canon declares that "no accusation in writing should be accepted."
Obj. 3: Further, a man's crime is made known by denunciation, even as by accusation. Now writing is unnecessary in denunciation. Therefore it is seemingly unnecessary in accusation.
On the contrary, It is laid down (Decret. II, qu. viii, can. Accusatorum) that "the role of accuser must never be sanctioned without the accusation be in writing."