When banks tell Stripe about an updated card, Stripe replaces the old details such as the old expiration date or card number with the new details. When that happens, Stripe creates an event in your account:

• If you’re using PaymentMethod, we would send the event payment_method.automatically_updated
• If you’re using legacy Card or Source, we would send a customer.source.updated event

To only filter events where card updater occurred, you can use the List Events API endpoint and only filter on the relevant event type above. You can then ignore events where request[id] is not null, and this would give a view of all instances where a card was updated automatically.