All Checkout.com codes
CHECKOUT.COM · RESPONSE CODE
Checkout.com20124
Missing CVV value, required for ecommerce transaction
Checkout.com saysIntegration issue
20124Missing CVV value, required for ecommerce transaction
What it means
Missing request data
A required field was not sent.
What to do
Add the missing field and send the request again.
Don't retry as-isWho can fix it: You, the merchant
Yuno response codeMISSING_PARAMETERS
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.