sai008

Hotels lose billions of dollars each year to "friendly fraud" chargebacks (such as Visa Reason Code 10.4: Other Fraud in a Card-Absent Environment). In a typical scenario, a guest completes a multi-night stay, incurs dining charges, and subsequently tells their credit card issuer that they never authorized the transaction. Because the evidence needed to contest these claims sits scattered across disconnected systems—property management systems (PMS), EMV chip terminals, keycard door-lock audit logs, and signed dining slips—hotel staff often forfeit legitimate revenue simply because compiling a compliant rebuttal packet takes hours of manual effort. FolioShield is an open-source, outside-in chargeback defense and evidence-preparation platform built specifically for the hospitality industry. It requires zero initial PMS integration: staff simply upload their existing bank dispute notices and PMS folio exports. FolioShield executes 10 deterministic mathematical reconciliation proofs to verify balances and rates without AI math hallucinations, matches supporting stay exhibits against strict card-network rules, drafts an evidence-backed rebuttal using guarded Meta Llama 3.3 70B models, and requires explicit manager sign-off locked under a cryptographic SHA-256 fingerprint. Finally, it compiles a bank-ready 3-page PDF evidence packet and validated submission bundle for staff upload to acquirer portals.