Recently found a bug in payment module “Credit Card UK with CVC”. I was using this module with CRE Loaded pro 6.4.0.
This payment module sends middle digits of CC and CVV code in an email to admin. Due to the bug this CVV code value was missing.
To fix the issue open file
includes/modules/payment/cc_uk.php in editor and find line
$this->cc_issue = (isset($_POST['cc_issue'])) ? $_POST['cc_issue'] : '';
after this line add line
$this->cc_ccv = (isset($_POST['cc_ccv'])) ? $_POST['cc_ccv'] : '';
and you are done. Save the file and test.
Please be sure to backup your file before editing.