Karin Lehmann currently teaches Business Law 1 and International Economic Law to undergraduate and master's students respectively. She has previously taught Competition Law, Consumer Protection and the law of Sale & Lease to LLB students. She has published on a diverse range of topics. Her peer-reviewed articles include:
- The Act of State Doctrine in South African Law: poised for reintroduction in a different guise?" SA Public Law 15 (2) 2000 337-356
- The Foreign Act of State Doctrine: its implications for the Rule of Law in South Africa" SA Public Law 16 (1) 2001 68-92.
- Aboriginal Title, Indigenous Rights and the Right to Culture" SAJHR (24) 2004 86 - 118
- The UN Convention on Contracts for the International Sale of Goods: Should South Africa Accede 18 (3) 2006 317-328 SA Mercantile Law Journal
- In Defense of the Constitutional Court: Litigating socio-economic rights and the myth of the minimum core 22 Am. U. Int'l L. Rev. 2006 101-135.
- To define or not to define: The definitional debate revisited 31 American Indian Law Review (2006-2007)
- Death and Dependency: The Meaning of 'Dependent' under Section 37C of the Pension Funds Act 24 of 1956 126 (4) 2009 South African Law Journal 650
- 'Voluntary compliance' in L Kotze and A Paterson (eds) Environmental Compliance & Enforcement in South Africa: Legal Perspectives (Juta) 2009.
She is also a contributor to Wille's Principles of South African Law (9ed), Principles of the Law of Sale & Lease (2nd & 3rd eds) and Basic Principles of Business Law (1st & 2nd eds) . She has presented at a number of national and international conferences, on indigenous rights, socio-economic rights, environmental law, property law, succession law and family law. She is currently working on a PhD, examining the constitutional implications of selected proprietary consequences of relationships (particularly common law duties of support and restrictions on testamentary freedom).