M&T Bank v. Lewis

Summary

The court held that the filed rate doctrine does not deprive a court of subject matter jurisdiction or render an appeal moot because it concerns the legal sufficiency of a claim or defense. It also held that allegations that a mortgagee inflated force-placed insurance charges through an undisclosed rebate arrangement sufficiently related to the making, validity, or enforcement of the mortgage to support special defenses of unclean hands and breach of the implied covenant of good faith and fair dealing. The judgment was reversed and the case remanded for further proceedings.