Stripe decline codeStripe: card declined, currency_not_supported

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Why the card refuses the currency, and the fix

1. 01

   The card issuer doesn’t allow the currency

   “The customer needs to check with the issuer whether the card can be used for the type of currency specified.” Stripe, Decline codes (currency_not_supported)

   Some cards, often local debit cards, only pay in their home currency. Stripe can’t change this, so ask the customer to use another card or a different payment method.

2. 02

   American Express can’t take that currency

   “American Express doesn’t support currencies marked with an asterisk (*) in any Stripe account country.” Stripe, Supported currencies

   American Express doesn’t support some currencies in any Stripe country. If Amex customers fail in one currency, check the asterisk list on Stripe’s currency page and offer another currency or method. Currencies without an asterisk can still fail for Amex in some countries.

3. 03

   The app sends the wrong currency

   “Make sure to use all lowercase letters when entering the three-letter ISO code in any payment request.” Stripe, Supported currencies

   A currency picked from the browser locale, or a typo in a config file, can charge a currency you didn’t plan for. Send the three-letter ISO code in lowercase, from one list your app controls.

   const PRICES = { usd: 1999, eur: 1899, gbp: 1599 }; // server-side, minor units
   if (!(requested in PRICES)) throw new Error('Unsupported currency');
   await stripe.paymentIntents.create({ amount: PRICES[requested], currency: requested });

4. 04

   The message hides the next step

   A generic “card declined” leaves the customer guessing. For this code it is fine to say the card can’t pay in this currency and suggest another card.

Checked against the vendor’s docs on November 9, 2026: Stripe docs: Decline codes; Stripe docs: Supported currencies.

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Related: Stripe card_not_supported · Stripe amount_too_small · Stripe generic_decline · Stripe Checkout Session expired