• Contract law
• Unjustified enrichment law
• Consumer protection
• Consumer credit
• International harmonization of commercial law
• Private international law
• International sales law

Unjustified enrichment law, consumer credit law, private international law, international sales law, international harmonization of commercial law

• Eiselen S, Kritzer A International Contract Manual Volumes VI and V annual update ‒ looseleaf (2008 Updated to 2020 (Thomson West Rochester)
• Naude T & Eiselen S (eds) Commentary on the Consumer Protection Act annual update ‒ looseleaf (2016, updated 2020 Juta Cape Town)
• Eiselen S 'Chapter 5: 'Scope' in Dimatteo et al (eds) Restatement of International Sales Law 2nd (2021 CUP)
• Eiselen S 'Chapter 6: Jurisdiction' in Dimatteo et al (eds) Restatement of International Sales Law 2nd (2021 CUP Cambridge)
• Eiselen S 'Chapter 7: Formalities' in Dimatteo et al (eds) Restatement of International Sales Law 2nd (2021 CUP Cambridge)
• Eiselen S 'E-Commerce' in Van der Merwe D et al Information and Communications Technology Law 2nd ed (2016 LexisNexis Durban)
• Eiselen S & Pienaar G Unjustified Enrichment Law Cases and Materials 4th ed (LexisNexis 2017)
• Eiselen S ‘Online Contracting in an International Commercial Context’ in Hutchison A & Myburgh F Research Handbook on International Commercial Contracts (2020 Elgar)

• CISG-AC Opinion No. 13 Inclusion of Standard Terms under the CISG, Rapporteur: Professor Sieg Eiselen, College of Law, University of South Africa, Pretoria, South Africa. Adopted by the CISG Advisory Council following its 17th meeting, in Villanova, Pennsylvania, USA, on 20 January 2013 (http://www.cisgac.com/cisgac-opinion-no13/)
• Eiselen S COMESA Model Law on Electronic Transactions and Guide to Enactment (2011) Report to the COMESA Council of Ministers
• Eiselen S ‘What to do with Bitcoin and blockchain’ 2019 THRHR 632-640
• Eiselen S 'Control of Unfair Standard Terms in International Commercial Contracts' in Schwenzer I (ed) 35 Years CISG and Beyond (2016 eleven The Hague)
• Eiselen S "Teaching transnational commercial law in the African context" 2016 (40(2)) University of Western Australia LR 3-22
• Eiselen S 'CISG as bridge between common and civil law' in Dimatteo L (ed) International Sales Law: A Global Challenge" (2016 CUP Cambridge)
• Eiselen S "The evolution of the SA enrichment law" in Carnelly M, Hoctor S & Mukheibir A (eds) De Jure Gentium et Civili  Festschrift in honour of Eltjo Schrage (2014 Faculty of Law NMMU  Port Elizabeth) ISBN 9-780620-550710 p 82-98
• Eiselen S 'The Integration of the UN Electronic Communications Convention and the CISG' in Schwenzer I, Atamer Y and Butler P (eds) Current Issues in the CISG and Arbitration (2013 Eleven The Hague) ISBN 978‐94‐6236‐097‐6 p 145-166
• Eiselen S eWaste in Anderson RC (ed) Berkshire Encyclopaedia of Sustainability Volume 9/10 : Afro-Eurasia: Assessing Sustainability (2012 Berskhire)
• Eiselen S Chapters in Flechtner H (ed) UNCITRAL Digest 2012 Journal of Law and Commerce Vol 30 331-374
• Eiselen Sieg "Adopting the CISG in South Africa; Reflections 8 years down the line" 2007 SA Merc LJ 14-25
• Eiselen Sieg "The UNECIC: International Trade in the Digital Era" 2007(2) Potchefstroom Electronic Law Journal 1/49-49/49
• Eiselen S 'Ch VI: Final Provisions'; and 'Part III: The Interaction between the UNECE and the CISG' in Kilian W and Boss A (eds) "The United Nations Convention on Electronic Communications in International Contracts (UNECE) 2009 Kluwer 58-84
• Eiselen Sieg ‘Adoption of the Vienna Convention for the International Sale of Goods in South Africa’ Vol 116(II) (1999) SALJ 323-370

Advocate of the High Court, member of the Johannesburg Bar, Fellow of the Arbitrations Association of South Africa

Orcid ID: 0000-0002-6344-1976