Friday, 20 March 2026
Chair
Sonia Stewart, Barrister, 5 Wentworth Chambers, Leading Junior TMT and IP, Legal 500 2026; Leading Intellectual Property Junior Counsel Doyle's Guide 2025
Description
Attend and earn 1 CPE Hour in Trade Marks
This program is applicable to practitioners from all States & Territories
Honest Concurrent Use and Prior Use of Trade Marks: The Current Position in Australia
- Seeking registration of a trade mark on the basis of prior use or honest concurrent use
- Changes to evidentiary requirements for honest concurrent use
- Defense's to infringement of honest concurrent use
- Review of Fanatics, LLC v FanFirm Pty Limited and Firstmac Ltd v Zip Co
- Practical implications for practitioners
Presented by Donna Short, Partner, Addisons; Recognised in Chambers Asia Pacific for Intellectual Property: Trade Mark & Copyright 2026
Presenters

Sonia Stewart, Barrister, 5 Wentworth Chambers
Sonia specialises in intellectual property law, with a strong focus on trade marks, branding and advertising. This includes obtaining injunctive relief to restrain competitor brand launches and advertising campaigns, over a career spanning more than two decades. Admitted in 2001 and called to the Bar in 2016, Sonia was formerly a Senior Associate in the Intellectual Property & Dispute Resolution Group at Mallesons (currently KWM). Sonia has also held senior in-house and executive roles for major brand owners of fast-moving consumer goods and in highly regulated industries. Sonia’s corporate experience enables her to advise clients in a concise and commercially relevant manner. Sonia is commended by clients and solicitors for her collaborative approach to working and the tenacity and clarity of her advocacy. She appears regularly, both led and unled, in litigation at trial and appellate level, representing a variety of clients, including in challenging areas such as tobacco, alcohol, gambling, food & beverages and pharmaceuticals. Sonia’s portfolio of clients includes global brands such as The a2 Milk Company, Pastificio Rana S.p.A (RANA pasta), PDP Fine Foods (WICKED SISTER Desserts), Cantarella Bros (ORO coffee), NPPA (PayID), Myriad Women’s Health (FORESIGHT Carrier Screening), NOVA Entertainment, Procter & Gamble, Juno Pharmaceuticals, ProductReview.com.au, Nestlé and Imperial Tobacco. Sonia appears primarily in the Federal Court of Australia and before IP Australia. Sonia has been recognised in the Doyles Guide for 2022, 2023, 2024 and 2025 as recommended Junior Counsel Intellectual Property (New South Wales) and as a Leading Junior TMT and IP, Legal 500 for 2026. Sonia also regularly presents at and chairs seminars on brands and trade marks.

Donna Short, Partner, Addisons
Donna Short is a Partner in the intellectual property group at Addisons, guiding clients through the entire IP lifecycle from innovation to enforcement. Her practice spans contentious and non-contentious matters, with expertise in trade marks, copyright, IP commercialisation, advertising compliance as well as privacy and data protection. Donna advises clients on trade mark prosecution as well as portfolio management and she regularly acts in proceedings before IP Australia and the Federal Court. Donna is ranked in the Chambers Global and Asia Pacific Guides 2026 for her work in IP and was recognised as a Leading Partner in the area of Intellectual Property by The Legal 500 in 2026.