# Polymarket's Processor Rejected More Than 80 Percent of Deposits at the Peak of a $10 Million Card-Fraud Attempt

The Wall Street Journal reports the chief executive told compliance staff to keep growing, while Kalshi separately denies that its crypto volume is inflated.

- Published: 2026-09-21T05:47:19.973Z
- Canonical: https://polylog.news/crypto/2026-09-21/polymarket-s-processor-rejected-more-than-80-percent-of-depo
- Publisher: Polylog (Crypto desk)
- Section: crypto
- Sources: [Polylog editors](https://polylog.news), [crypto.news](https://crypto.news/kalshi-faces-wash-trading-claims-over-crypto-volume/), [The Block](https://www.theblock.co/news/regulation/2026-09-20-polymarket-faced-10-million-fraud-attempt-as-its-ceo-pushed-growth-over-compliance-concerns-wsj-415875)

Prediction markets spent 2026 arguing they were market infrastructure rather than gambling. Two disclosures this weekend test that claim from opposite directions. The Wall Street Journal reported on 20 September that fraudsters linked stole…

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