Business Law Library & Tracker
Consumer Law & Trading
Consumer rights, unfair terms, online sales, subscriptions and trading conduct.
Sources last reviewed 17 Aug 2026
Main law guides
158
Acts, regulations and codes worth reading first
Topics
60
Plain-English clusters
Published case explainers
97
Selected cases with a business lesson
Tracked updates
11
New, amended & reviewed
Plain-English explainers, not legal advice. Use the linked official source for section-level detail, and get advice for your situation.
Get legal helpMain laws
Commerce Act 1986
1986 No 5
Consumer Guarantees Act 1993
1993 No 91
Credit Contracts and Consumer Finance Act 2003
2003 No 52
Fair Trading Act 1986
1986 No 121
Human Rights Act 1993
1993 No 82
Shop Trading Hours Act 1990
1990 No 57
Motor Vehicle Sales Act 2003
2003 No 12
Weights and Measures Act 1987
1987 No 15
Auctioneers Act 2013
2013 No 148
Grocery Industry Competition Act 2023
2023 No 31
Fuel Industry Act 2020
2020 No 60
Dairy Industry Restructuring Act 2001
2001 No 51
Defamation Act 1992
1992 No 105
Trade (Anti-dumping and Countervailing Duties) Act 1988
1988 No 158
Cases
Commerce Commission v Viagogo AG
A marketplace is responsible for the impression created by the whole customer journey. A technical disclosure, refund policy or later fee breakdown may not correct...
Commerce Commission v Steel & Tube Holdings Limited
A standards claim must be supported by the actual testing method, sample selection and certification chain. Repeating a supplier or laboratory statement is not...
Lodge Real Estate Ltd v Commerce Commission
Competitors should not coordinate how they will pass on costs, set fees or respond to a supplier price change. Even informal industry discussions can create...
Commerce Commission v Fonterra Cooperative Group Ltd
For ordinary businesses, the practical lesson is not about dairy valuation theory. It is about how regulated pricing and supply obligations work in real life. If...