Google may index your Cpanel temporary URL, leading to duplicate content warnings.
You should create a ".htaccess" file in the root of your old domain (or edit an existing one) and place the following code inside:
Options +FollowSymLinks
RewriteEngine on
RewriteRule (.*) http://www.newdomain.com/$1 [R=301,L]
Please REPLACE
www.newdomain.com in the above code with your actual domain name.
