When Stripe returns decline code currency_not_supported, it means: card does not support the specified currency. This is classified as a hard decline in the CardType subcategory. This type of decline usually requires direct customer action to resolve.
LostChurn detects card type restrictions and guides the customer to use an accepted card type. We send a clear email explaining which card types are accepted, with a one-click link to update their payment method.
Do not retry the same card details. Trigger Account Updater check first, then send a payment update email. Wait 0 hours between outreach attempts. Maximum 0 contact attempts over 14 days before marking as churned.
The code currency_not_supported is also returned by 2 other payment processors:
LostChurn detects currency_not_supported declines in real time and applies the optimal recovery strategy — no manual intervention needed.
