What is the test for the purpose of giving notice and opportunity to be heard in a civil case?

"A fundamental requirement of due process is `the opportunity to be heard' citation omitted ... at a meaningful time and in a meaningful manner." Armstrong v. Manzo, 380 U.S. 545, 552, 85 S.Ct. 1187, 1191, 14 L.Ed.2d 62 (1965). Implicated in this formulation of the standard is the further question of meaningful to what? The answer seems straightforward enough the hearing must be meaningful in terms of the threatened conduct. That is, if the conduct does not threaten the interest, due process does not require notice and an opportunity to be heard.³⁷