# Certificate renewal
source: https://developer.mastercard.com/account-to-account-commerce-for-csp/tutorial/key-exchange-process/step4/index.md

### Certificate renewal {#certificate-renewal}

Mastercard notifies security officers 120 days before a certificate expires through the contact information provided in KMP. To avoid any disruption of service,participants must log in to KMP to renew a certificate before its expiration date.   
Note: Participants may choose to renew certificates at any time without receiving notification from KMS.