Credit card declined in Comoros

It’s not your card, it's the system. In Comoros, credit card acceptance is rare outside of some very high-end hotels. Most businesses, restaurants, and taxis are cash-only. The best thing you can do is have enough cash to cover your expenses. I'd recommend using an ATM at the Banque de l'Industrie et du Commerce (BIC) in Moroni. Always carry cash with you, as you will not be able to rely on your credit card for day-to-day purchases.

You'll find that credit cards are not widely accepted in Comoros. The country's economy for tourists is largely cash-based. Even with international transactions activated, your bank's fraud department might be flagging it. The best solution is to get cash. You can try to withdraw money from a bank ATM, or if that's not working, go inside a bank with your passport and see if you can get a cash advance. But honestly, cash is the only way to go.

I ran into the same issue. My card was an American Express, which is not widely accepted there, but even a Visa card that a friend had was declining. The problem is a combination of old card terminals and poor network connectivity. You'll have much better luck just using cash. My advice is to exchange some money at a bank or a money changer in Moroni. Don't rely on your card to work for anything other than perhaps a few high-end hotels.

That's frustrating, and unfortunately, it's not unusual. The financial infrastructure in Comoros is not very developed, and credit card acceptance is very limited. Even at places that claim to accept cards, the connection can be unreliable. My advice is to get a good amount of local currency, the Comorian franc (KMF), from a bank ATM like the Banque de Développement des Comores. The most reliable way to pay for everything, especially outside the capital of Moroni, is with cash.