Not sure the exact mechanics behind it, but essentially the banks send out updates to credit cards to processors. Processors like Stripe then automatically update those details within their systems.<p><a href="https:&#x2F;&#x2F;support.stripe.com&#x2F;questions&#x2F;how-can-i-keep-customer-card-details-up-to-date" rel="nofollow">https:&#x2F;&#x2F;support.stripe.com&#x2F;questions&#x2F;how-can-i-keep-customer...</a>