Intelligence center On Demand Webinar

DEFEND: Protecting Marketplaces from Fraudsters, Spammers, and Jerks

Today’s marketplace scams have evolved far beyond simple fraud, now including sophisticated buyer-seller collusion rings, account takeovers, payments and shipping/returns fraud. With money moving quicker than ever, today’s scammers operate faster than many marketplaces can detect and easily bypass the vigilance of savvy consumers.

In this session, OfferUp and DataVisor will share real-world marketplace risks and practical approaches to combat them. We’ll explore detection strategies including scoring systems, rules implementation, and how AI-powered technology works in real-time to identify suspicious patterns across seemingly unrelated accounts. You’ll leave with actionable insights that strengthen your marketplace defenses.

Watch To:

  • Discover how A/B testing can pinpoint the right level of user verification without killing conversion.
  • Learn how fraudster economics influence attack patterns—and how to make your platform too expensive to target.
  • Explore defense strategies that confuse and delay fraudsters without disrupting real users.
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Scams on marketplaces now span fake listings, identity spoofing, and rapid-fire payment abuse. This session highlights how modern fraud rings operate and how platforms can detect them using dynamic scoring, behavior signals, and real-time AI. Learn how to stop bad actors before they impact your users or revenue.

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Meet the Speakers

Steve Headshot
Steve Knopf
VP, Product Strategy
DataVisor

Steve Knopf is the Vice President of Product at DataVisor, bringing over two decades of experience in product management and trust & safety. Prior to joining DataVisor, he led the development of trust and safety teams at LetGo and held product leadership roles at eBay, focusing on fraud detection and mitigation.

Nicole Pauls
Senior Principal Product Manager
OfferUp

Nicole Pauls is a seasoned product management professional with extensive experience in IT security and customer trust initiatives. Currently serving as a Senior Principal Product Manager at OfferUp since July 2021, Nicole focuses on enhancing the customer experience in buying and selling through platform feature extensions and threat monitoring.

About DataVisor

DataVisor is recognized as an industry leader and has been adopted by many Fortune 500 companies across the globe.

DataVisor is the world’s leading fraud and risk management platform that enables organizations to respond to fast-evolving fraud attacks and mitigate risks as they happen in real time. Its comprehensive solution suite combines patented machine learning technology with native device intelligence and a powerful decision engine to provide protection for the entire customer lifecycle across industries and use cases.