All Checkout.com codes
CHECKOUT.COM · RESPONSE CODE
Checkout.com20101
No account or customer found; the token is incorrect or invalid.
Checkout.com saysIntegration issue
20101No account or customer found; the token is incorrect or invalid.
What it means
Invalid request data
A field in the request has a wrong value or format.
What to do
Compare the request with the provider's API reference. The response detail usually names the field.
Don't retry as-isWho can fix it: You, the merchant
Yuno response codeINVALID_PARAMETERS
Other Checkout.com codes with the same meaning
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.