Randi W. Singer

RANDI SINGER focuses her practice on copyright, Lanham Act false advertising and trademark matters, litigating for and advising clients across numerous industries. Her advertising cases have spanned a very broad spectrum of products and services including prescription drugs and biologics, molecular diagnostic assays, over-the-counter drugs, razors, toothpaste, paint, pet food, chocolate, cosmetics, financial services, cell phone cases, luxury goods and consumer electronics. Randi has represented and counseled clients on a wide variety of copyright and trademark matters, encompassing classic ownership and fair use issues for works including comic books, academic works, reality television, music and photographs, as well as artificial intelligence, keyword advertising, online advertising and regulation, Section 230 issues, web scraping, and the intersection of privacy and intellectual property. She represented eBay in Tiffany v. eBay, the landmark case in secondary trademark liability, and is regularly called upon by major internet platforms for help navigating a complex array of secondary liability concerns.

“Randi knows IP law inside and out… and brings practical business-focused advice to the questions presented.”
Chambers USA 2023 

Randi is consistently recognized by industry publications for her work in intellectual property and media and entertainment. She is ranked by Chambers USA as a leading lawyer for Nationwide Advertising: Litigation (2024–2025), and in New York for Intellectual Property: Trademark, Copyright and Trade Secrets (2009–2015, 2021–2025) and Media and Entertainment: Litigation (2023–2025), where clients have noted that she is a “top-notch IP lawyer,” a “phenomenal, phenomenal lawyer” who “understands our business as we do, and sometimes better,” and that they “particularly appreciate Randi’s ability to not only identify legal risk, but then thoughtfully embrace, balance, and mitigate it” and her penchant for directing “practical business-focused advice to the questions presented.” In 2023, The National Law Journal named Randi a “Trailblazer” in Media & Advertising Law, an award distinguishing the top 12 nationwide “agents of change.” The Legal 500 also ranks her as a “leading lawyer” in Advertising & Marketing Litigation, and recommends her in Trademark Litigation, Copyright, and Media and Entertainment Litigation, where clients have called her “highly responsive, direct, and super smart.” Randi is ranked by WTR 1000 as a leading trademark litigator for Enforcement and Litigation, in which they describe her as a “professional firefighter who has a talent for making problems go away quickly,” who “employs a bit of magic to aggressively advocate for her client while not alienating her opposing counsel,” and who excels at “unravelling complex trademark problems and developing strategies to overcome them.” In 2021, she was shortlisted for the “New York Practitioner of the Year” award for Managing IP’s Americas Awards and, in 2020, she was named a BTI “Client Service All-Star.” Randi has been honored in Euromoney Legal Media Group’s Americas Women in Business Law Awards: for the 2023 “Trademark Lawyer of the Year” award (winner), for the 2021 “Best in Media & Entertainment” award (winner), and for the 2020 “Best in Trademark” award (shortlisted). She also has been recognized in Benchmark Litigation as a “Future Star” in 2025 and as a “Litigation Star” in 2026, Expert Guides, Managing IP magazine’s IP Stars (most recently as a Copyright Star and a Trademark Star in 2025), Super Lawyers, Law360, and Best Lawyers in America for Litigation – Intellectual Property (2025).

Randi also regularly advises clients in connection with privacy, cybersecurity, and social media issues. Randi is a Certified Information Privacy Professional (U.S.) and was recognized by The National Law Journal as one of its inaugural “Trailblazers” nationwide for her cutting-edge work in the cybersecurity and data privacy area in 2015.

Randi is frequently engaged to speak on panels and in discussions concerning copyright, advertising, and other intellectual property issues for organizations, such as the International Trademark Association (INTA), The Copyright Society, the National Advertising Division, the Practising Law Institute, the American Conference Institute, and the New York State Bar Association Intellectual Property Law Section.

Randi is an active proponent of advancement of women in the legal profession, and was inducted into the YWCA’s Academy of Women Leaders.

Prior to joining Sidley, Randi was head of the Privacy & Cybersecurity group and partner in the Intellectual Property & Media practice at another global law firm, splitting her time between Silicon Valley and New York.

• Represented Qualcomm Incorporated (NASDAQ: QCOM), a leading semiconductor and telecommunications technology company, in its acquisition of Arduino, an open-source hardware and software company.
• Served as co-lead trial counsel for innovator company CareDx, won a $45M trial verdict following five days of trial in a Lanham Act false advertising suit brought against a competitor, Natera. The jury found that Natera intentionally and willfully engaged in false advertising in the promotion of its kidney transplant rejection assessment test, and awarded CareDx $21.2M in compensatory damages and $23.7M in punitive damages under the Lanham Act, the Delaware Deceptive Trade Practices Act, and the Delaware unfair competition law.
• Secured major victories for eBay beginning with Tiffany v. eBay, the precedent-setting suit in which Tiffany sought unsuccessfully to transfer responsibility for policing its trademarks to eBay. Represented eBay through trial in the Southern District of New York, on appeal before the Second Circuit, and through the denial of Tiffany’s petition for a writ of certiorari with the U.S. Supreme Court. Since that time, Randi has won many additional victories for eBay, resolving litigation and pre-litigation copyright and trademark cases, securing summary judgment in multiple copyright infringement actions, and prevailing in matters on behalf of eBay subsidiaries Bill Me Later and Where.com.
• Represented a major social media platform and its subsidiaries in multiple matters, including successful defense and resolution of litigation and pre-litigation matters in courts around the country involving allegations of contributory or vicarious copyright and trademark infringement.
• Resolved multiple putative class actions alleging that chocolate contained heavy metal.
• Defeated a motion for a temporary restraining order involving advertising claims for a biologic brought on the eve of a major conference for medical providers.
• Successfully defended a major television programming company in litigation in California federal court involving copyright ownership and infringement issues, as well as counseled on various pre-litigation copyright matters.
• Resolved on behalf of a major hospitality company, industry-wide competitor and class action litigation involving keyword advertising.
• Won various significant copyright ownership cases in multiple jurisdictions involving iconic comic book characters including Spider-Man, Iron Man, The Fantastic Four, The Incredible Hulk, and Ghost Rider.
• Obtained favorable resolutions for numerous companies in investigations by the Federal Trade Commission (FTC), state attorneys general, and in proceedings before the National Advertising Division (NAD).
• Represented and counseled a wide array of technology companies, private equity firms, and corporates on privacy and cybersecurity issues arising in hundreds of acquisitions and licensing deals.
• Helped debtors such as Sears, Great Atlantic & Pacific Tea Company, and Golfsmith in connection with the sale or transfer of customer information in bankruptcy proceedings.
• Successfully defended a major distributor of consumer goods against claims of counterfeiting.
• Defended Procter & Gamble (P&G) against an $80 million claim brought by Colgate-Palmolive. The suit stemmed from Colgate’s allegations that P&G’s advertising for its highly successful at-home tooth-whitening products, Crest Whitestrips and Crest Night Effects, were false under the Lanham Act. Obtained a complete defense verdict for P&G after a three-week jury trial.
• Defended GlaxoSmithKline (GSK) against a preliminary injunction motion based on allegations that GSK commercials for Nicorette gum and NicoDerm CQ patches were false and violated the Lanham Act. Successfully obtained a motion on GSK’s behalf to preliminarily enjoin Pharmacia’s “Trying to Quit” commercial for Nicotrol due to violations of Section 43(a) of the Lanham Act.

Some of the above matters were handled prior to joining Sidley.

Randi is a member of the International Trademark Association (INTA), the International Association of Privacy Professionals (IAPP), the American Bar Association Antitrust Section (Private Advertising Litigation), and the New York City Bar Association Sports Law committee (IP subcommittee). Randi has also served on the Trademarks and Consumer Affairs Committees of the New York City Bar Association.

From 2015 to 2024, Randi served as the general counsel for the Lang Lang International Music Foundation. Her additional bono work includes litigation successes for the Hebrew Immigrant Aid Society and Sanctuary for Families, and trademark and IP counseling for organizations such as Global Citizen, the Joe Torre Safe At Home Foundation, the Museum of Jewish Heritage, and Women Creating Change.