If he shipped it Fedex or UPS, there is almost definitely a tracking number. But since you said post office, I assume he means USPS which has tracking services "available". Tracking is cheap if it's not already included. It's usually about $2 but it may be different for international. Either way it would be silly not to get one for such a long journey. You never know what people will do though.
Thankfully, International Priority includes "At no charge, $200 insurance for items containing merchandise". The more expensive but unlikely GXG service includeds $100 worth of insurance. So if anything happens, you'll at least get some or all of your money back.
[URL unfurl="true"]http://https//www.usps.com/international/priority-mail-express-international.htm[/URL]
