A batch of 240 letters sent by a Columbia University business professor in a bid to teach students how companies handle complaints, has landed him in hot water.

Discover B2B Marketing That Performs

Combine business intelligence and editorial excellence to reach engaged professionals across 36 leading media platforms.

Find out more


Six restaurateurs are now suing the university for US$100m, claiming the study was libelous, “unethical and malicious”.


Last August, Francis J. Flynn, an assistant business professor, sent out the letters to New York restaurants falsely complaining of food poisoning as part of a project judging how businesses respond to complaints.


Flynn claimed he had visited the restaurant for a meal with his wife on their wedding anniversary, after which he suffered “extended nausea, vomiting, diarrhoea and abdominal cramps”.


Despite not being authorised by the university, the letters were on official Columbia stationery and caused serious concern amongst restaurant staff, who scoured credit card records, menus and delivery tickets to establish when Flynn might have visited and what the possible causes of the poisoning could have been.

GlobalData Strategic Intelligence

US Tariffs are shifting - will you react or anticipate?

Don’t let policy changes catch you off guard. Stay proactive with real-time data and expert analysis.

By GlobalData

Virgil Renzulli, Columbia’s associate VP for public affairs, told the Associated Press that the business school sent written apologies to all 240 restaurants when the project was exposed in September.

Just Food Excellence Awards - The Benefits of Entering

Gain the recognition you deserve! The Just Food Excellence Awards celebrate innovation, leadership, and impact. By entering, you showcase your achievements, elevate your industry profile, and position yourself among top leaders driving food industry advancements. Don’t miss your chance to stand out—submit your entry today!

Nominate Now