moving domain and ssl

I maintain the registration and host a domain for a colleague, where we utilise the free CPanel SSL certificate. It's just been sprung upon me that he will be moving his domain to a 3rd party web developers server this weekend. My intentions are to change the NS pointers at registrar level to point the new server, whereby the developers can recreate the new domain and do what ever they seem fit to do. I have a few concerns around SSL though. When the domain is moved to the new server, I assume it will lose it's SSL, as this is hosted by my own cPanel. Will I need to revoke/delete this SSL certificate within my own WHM panel before we can purchase or install a paid up cert.?