Free Trial Validation will enable additional checks when validating a license. The additional checks will ensure a user is not abusing a timed trial by simply signing up for a new trial when the previous trial has expired.&lt;br /&gt;&lt;br /&gt;For &lt;b&gt;Per Install&lt;/b&gt;, PHPAudit checks the database for an existing hostname, IP address or directory path for the particular product this licensing type is assigned to.&lt;br /&gt;&lt;br /&gt;For &lt;b&gt;Per Site&lt;/b&gt;, PHPAudit checks the database for an existing hostname and IP address for the particular product this licensing type is assigned to.&lt;br /&gt;&lt;br /&gt;For &lt;b&gt;Per Server&lt;/b&gt;, PHPAudit checks the database for an existing server hostname, server IP address or Media Access Control (MAC) address for the particular product this licensing type is assigned to.