An endorsement sometimes added to a directors and officers (D&O) liability insurance
policy form. Tie-in endorsements state that if an insured's D&O and fiduciary
liability policies are written by the same insurer, only one policy limit applies
(or the higher of the two limits applies if the limits are different) when
a claim arises from essentially the same set of acts or facts. Tie-in endorsements
first appeared after Enron's 401(k) plan holders filed lawsuits, alleging almost
the identical wrongful acts that were stated in shareholder class action suits
against Enron and its directors and officers.