Banks implement fraud detection systems that monitor card use patterns. When transactions unexpectedly occur in foreign locations without prior notice, cards might be blocked or declined to prevent suspected fraud. Informing your bank and credit card issuers about your travel destinations and dates preempts such interruptions by authorizing foreign usage. Additionally, you gain clarity on fees for international transactions, ATM withdrawals, and emergency card replacement procedures. This communication empowers smoother access to funds throughout your trip and reduces stress. It’s wise to carry backup cards and some emergency cash to cover unforeseen situations if your primary cards are temporarily blocked.