Anthropic Faces Billing System Crisis: $16.6M Phantom Invoice Charges Korean User
Key Takeaways
- ▸A Korean Claude user received $16.6M in phantom invoices from Anthropic within 24 hours, with zero recorded API usage and no registered payment method
- ▸Invoices appeared legitimate and routed through official Anthropic/Stripe infrastructure, but the billing system attempted to charge a card the user claims was never registered
- ▸No actual money was collected—both charge attempts were declined due to transaction limits—but the incident raises serious questions about Anthropic's billing security and controls
Summary
A Korean Claude user reported receiving phantom invoices from Anthropic totaling $16,627,739.70 in early July, allegedly generated by the company's Stripe billing system within 24 hours. The user claims to have been on the free tier with zero API usage and no registered payment card, yet received two invoices via legitimate-appearing Stripe emails from Anthropic's official domain—first for $1.67M, then $16.6M.
While both invoices ultimately failed to collect payment after being declined by the user's card issuer, the incident reveals potential vulnerabilities in Anthropic's payment processing infrastructure. Bank statements show two charge attempts made to a card the user insists was never registered on his account, raising questions about how the billing system obtained payment information and initiated charges without proper authorization.
Anthropic has declined to provide details to journalists at ZDNet, stating only that individual account matters are confidential. The company has not yet clarified whether the phantom invoices resulted from a billing error, security breach, or system malfunction. As of publication, the underlying cause remains unexplained, and the user has indicated he will share updates as the situation develops.
- Anthropic has refused to comment on specifics, leaving open questions about root cause and whether other users may have experienced similar issues
