You need to send prepaid FedEx envelope with your passport, fold the prepaid FedEx envelope and put it with all other stuff keep one copy of airway bill with you so that you can track the envelop latter
Address on Return Envelope:
FROM:
Your name
Your address
TO,
YOUR NAME
YOUR ADRESS
*** Give the credit card # to FedEx that is not going to expire in 4-5 months