Thus, she waived any challenge to the trial court's personal jurisdiction over her and to the adequacy of service of process. See Nelson v McCormick, 334 Mich. 387, 389-390; 54 N.W.2d 694 (1952).
"The entering of a general appearance by the principal defendant gives the court jurisdiction in personam." Nelson v McCormick, 334 Mich 387, 389; 54 NW2d 694 (1952). Two requirements must be met to render an act adequate to support the inference that it constitutes a general appearance: (1) knowledge of the pending proceedings and (2) an intent to appear.
See generally 6 CJS, Appearances, ยง 25, p 68. See Austin v. Burroughs (1886), 62 Mich. 181; Nelson v. McCormick (1952), 334 Mich. 387. In the instant case there could be no authority, either expressed or implied, enabling Johnson to enter an appearance for the estate because the administrator, from whom such authority must come, had expired.