Quasi-estoppel is estoppel against inconsistent positions, and, like equitable estoppel, it is imposed by law in the interest of fairness to prevent fraud or injustice. In function, however, equitable estoppel seeks to protect the parties' reasonable expectations, whereas quasi-estoppel seeks to protect the integrity of litigation. Quasi-estoppel must be based on the previous assertion of a position so inconsistent with the one now taken as to make the present claim unconscionable.
Abdelhamed v. XYZ Limousine, Inc., NY Slip Op 03770 (2d Dep't June 17, 2026)

