If you cannot send a credit note via the PayOne plugin, the cause is often related to the underlying payment or the installed plugin version of your main client.

Checking the Credit Note Requirements

• Correct payment: Check whether the payment underlying the order for the credit note is a correct PayOne payment.
• Plugin version: Verify whether your main client has the latest version of the PayOne plugin installed. The event actions of the plugin relevant for the credit note always depend on the version installed in the main client.