You’ll have to hook into that event in Shopify and then send a webhook into Klaviyo. Presumably that should trigger an event which then triggers your flow. It would be a custom coded project. Nothing out of the box. 

Hey @Adam-S 

Our Partner @DavidSandel indeed is right and this would be a great solution because webhooks allows real-time communication between systems, making it efficient and reliable. By integrating Shopify events with Klaviyo, you’ll have a seamless way to handle payment method updates and engage with customers effectively!

just encase you want to also know how make this happen, here are a few steps to follow: 

Step 1 - Shopify Event Hook Setup:

• Set up an event hook in Shopify to listen for the "Customer payment method updated" event.
• When this event occurs (e.g., a customer updates their payment method), Shopify will trigger your configured webhook.

Step 2 - Webhook Configuration: Configure your webhook to send relevant data to Klaviyo. This data might include:

        - Customer details (e.g., email, name).
        - Updated payment method information.
        - Any other relevant context.

Step 3 - Klaviyo Integration: In Klaviyo, create a flow or automation that listens for the webhook. Based on the data received, you can:

        - Send a confirmation email to the customer.
        - Update customer segments.
        - Trigger follow-up actions (e.g., personalized recommendations).

Last but not least - Testing and Monitoring:
    - Test the entire flow by updating a payment method in Shopify.
    - Monitor the webhook logs in both Shopify and Klaviyo to ensure successful communication.

We always around if you have any more questions but we hope this solves your question.