Collateral proceeding
Black's Law Dictionary · Henry Campbell Black, M.A. · 1910
Black's Law Dictionary
One in which the particular question may arise or be involved incidentally, but which is not instituted for the very purpose of deciding such question ; as in the rule that a judgment cannot be attacked, or a corporation's right to exist be questioned, in any collateral proceeding.
Peyton v. Peyton, 28 Wash. 278, 68 Pac. 757; Peoria & P. U. R. Co. v. Peoria & F. R. Co., 105 III. 116.