WHMCS has as part of its automated function a feature that automatically deletes inactive clients based on either active/inactive products or active/inactive products and not logged in for longer than 3 months.
Before deleting a customer account, shouldn't the client be given a warning twice or thrice that his or her account will be deleted?
This can be achieved with adding Email Marketer >>> Client Related >>> Inactive Client.
Deleting an account is a huge step and if a customer has personal issues that have prevented him or her from accessing his or her, then come back later to start off, meeting a situation where he or she can't gain access is deal-breaker for anyone.
WHMCS should either have as part of its Sign-in feature an option where an inactive account can be reactivated by the customer.
Or give an option where WHMCS can send notifications thrice before the system terminates and deletes the account.