If you use the email that is associated with your current StubHub.com account, be sure to follow the below steps to claim your guest check out tickets, as your tickets will not be found in your registered StubHub account.
Once you receive the email with your code to retrieve your Guest checkout tickets, go to StubHub.com
Click on My tickets in the top right corner
Next click on Order in the drop down menu
A pop up box will appear to Click Here if you have a code.
Select Click Here to enter your guest check out code and retrieve your tickets!