An Allegheny County judge has certified a class of plaintiffs who allege their title insurance companies engaged in a scheme in which they failed to charge discounted rates as required by a state-approved manual.

The plaintiffs in Patterson v. Fidelity National Title Insurance and DeCooman v. Lawyers Title Insurance allege that Fidelity National Title Insurance Co. and Fidelity National Insurance Co. of New York, as well as Lawyers Title Insurance Corp., failed to charge discounted rates for title insurance as required by Sections 5.3 and 5.6 of the Title Insurance Rating Bureau of Pennsylvania Manual.

Geoffrey A. Kahn and Burt M. Rublin of Ballard Spahr, attorneys for the defendants, did not return calls seeking comment Monday.