Mall Finance & Investment Co Ltd v Slater [1976] 2 NZLR 685, is a New Zealand case regarding whether a contract entered into to stop a party for filing criminal charge is legally enforceable or not.

[1] Gizelle Slater's de facto husband Gary Nausbaum was a director at Mall Finance.

To secure the agreement, Slater had to give a mortgage over her house at 60 Penrose Street, Lower Hutt.

Later, Slater had a change of heart (and perhaps a change of boyfriend) and applied to the High Court to set aside the mortgage because it was illegal at common law, being it was a contract entered into for the purpose of not to disclose a crime.

However the end effect is that any contract obtained to prevent someone not to report a criminal act, will not be legally enforceable.