Card replacement is the process of cancelling a payment card and supplying a new one on the same account. A cardholder requests it through the issuer's app, website or telephone line when a card is lost, stolen or damaged, and an issuer may start it when it detects that the card details have been compromised.
What changes depends on the reason. A damaged card can be replaced with the same number. A lost, stolen or compromised card is blocked permanently, and the new card carries a different number, expiry date and security code, so that the old details cannot be used for card fraud. Many issuers make the new card available at once in a digital wallet through push provisioning while the plastic is in the post. Merchants holding the old number need the new details unless a card updater service supplies them. A planned renewal at expiry is usually called a card reissue.