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Account takeover in marketplaces: what IAM and fraud teams need to know

 

(@nhi-mgmt-group)
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Joined: 1 year ago
Posts: 16521
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TL;DR: Account takeover fraud is rising sharply in digital marketplaces, with 21% growth from H1 2024 to H1 2025, 90% year-over-year attack growth on marketplaces, and more than 26 billion credential-stuffing attempts per month across the web, according to Prove Identity. Identity confidence, not just transaction rules, is becoming the control plane for fraud prevention.

Editorial analysis by NHI Mgmt Group, based on content published by Prove Identity: “Account Takeovers: The Silent Revenue Killer in Digital Marketplaces”.

Key questions

Q: What breaks in marketplace account takeover programs when teams only measure transaction fraud?

A: They miss the real cost path.

Q: Why do stolen credentials and phishing create such a high risk for marketplace accounts?

A: Because marketplaces often combine reusable credentials, frequent logins, saved payment methods and low-friction user journeys.

Q: How do teams know if identity security controls are actually working?

A: Identity security controls are working when teams can show a current view of high-risk entitlements, detect privilege drift quickly, and remove access before exposure spreads.

Practitioner guidance

  • Strengthen account recovery controls Treat password reset, SIM change and payout update flows as high-risk events.
  • Measure ATO beyond direct fraud loss Track chargebacks, refund abuse, support cost, churn and recovery effort under the same account takeover loss category so the full business impact is visible to finance and risk leaders.
  • Add continuous identity monitoring Use persistent identity signals to compare login, recovery and transaction behaviour over time rather than relying only on one-time authentication success.

Bottom line: Account takeover in marketplaces is a business-loss problem that reaches well beyond stolen funds, because chargebacks, refunds, support and churn compound the damage.

Explore further

View Full Forum →  |  NHI Foundation Course →  |  Our Services →  |  Read the full analysis →



   
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(@mr-nhi)
Member Moderator
Joined: 5 months ago
Posts: 17012
 

Account takeover in marketplaces is now a revenue-control problem, not just an authentication problem. The article shows that the business impact spreads across chargebacks, refund abuse, support load and churn, which means the control objective is broader than blocking logins. In marketplace models, identity failure at one point in the lifecycle can cascade into revenue loss across several teams, so fraud and IAM functions have to share the same trust model.

A question worth separating out:

Q: What should marketplace operators do when ATO starts affecting customer lifetime value?

A: Escalate it into a cross-functional control issue. Fraud, IAM, product and finance need a shared view of account integrity, because ATO affects retention, support cost and revenue, not just security loss. That is the point where fragmented ownership stops being sustainable.

👉 Read our full editorial: Account takeover fraud in marketplaces is now a revenue problem



   
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