Checkout.com saysSoft decline
20100Invalid expiry date format
What it means
Card details don't match
Something in the card details, such as the expiry date, name or address, does not match the issuer's records.
What to do
Ask the shopper to check and re-enter their details.
Worth retryingWho can fix it: The shopper
Yuno response codeINVALID_CARD_DATA
Reference only. Codes and descriptions come from each provider's public documentation. The Yuno response code is a reference mapping and does not guarantee how a specific transaction is processed.