There are 3 different certificates that are required for an app to be active on the Apple App Store:
Account Apple Distribution Certificate
App Distribution Certificate
Push Notification Certificate
As QikServe manage your app on your behalf, we will handle the publishing and managing of all of the above certificates.
When a certificate is due for renewal, the account holder of the Apple Developer account will receive an email (example below) stating that a certificate is due to expire. If you see this email there will be no action required from you - QikServe have the same information and will automatically renew the certificate for you.