Answer:
How do you denounce?
In writing, by submitting a written document, which must be signed by the person submitting the accusation, or if the person cannot present the complaint, by another person Who at their request, will sign it.
OR
To condemn or censure openly or publicly: to denounce a politician as morally corrupt. to make a formal accusation against, as to the police or in a court. to give formal notice of the termination or denial of (a treaty, pact, agreement, or the like).
Explanation:
Denounce means to condemn openly, accuse publicly, or formally end a treaty.