We’ve added a new key, $is_hard_declined, to the Payment failed event in Klaviyo. When a payment fails, and the subscription is paused or cancelled based on the brand’s hard decline behaviour settings in Payment recovery, the value of $is_hard_declined will be sent as true in the event payload.

You can use this to build targeted Klaviyo flows specifically for subscribers affected by hard declines, separate from your standard retry-based recovery messaging.