Attribute revenue with Paddle Overlay Checkout

Before proceeding, confirm that you have linked your Paddle account.

JavaScript

Paddle.Checkout.open({
  items: [...],
  customData: {
    website_id: 'flid_******',
  },
});

Flowsery routes Paddle webhook events with custom_data.website_id. Do not rely on _fs_vid or _fs_sid here.