Randomized string for checkout (guest)

This topic made me realized a new feature that should be added in:

http://forum.opencart.com/viewtopic.php ... 17#p230627

As most people may already know, websites like UPS, USPS, Fedex etc are providing randomized strings over emails when customers needs to check the status of their ordered products. It would be great to have similar feature over email for invoices purposes when customers has purchased products from OpenCart as a guest so in order to use a generated randomized string from URL or from text box on a separate template page which would be generated once and, then, redirect to the invoice page. The generated random string could also be set with a time to live.

this is exactly what i was looking for!

Done: http://forum.opencart.com/viewtopic.php?f=23&t=55332