Travel is an attractive target for card fraud: high-value products, fast fulfilment and easy resale. How travel platforms combine risk signals, 3-D Secure, review queues and chargeback handling without blocking good customers.
Supplier currency, selling currency and settlement currency are rarely the same. How to store money correctly, snapshot exchange rates, apply markup and rounding, handle refunds and keep FX exposure visible in a travel platform.
Timeouts and retries are normal in distributed systems. Idempotency keys, state machines and reconciliation make booking and payment flows safe to retry, without duplicate charges or orphaned reservations.
