Postal Money Order versus Bank Money Order ???

USPS money orders are valid only within the U.S.

In favor of bank cashiers' checks, I recently sent one in payment for an overseas item, and the airmailed check never arrived. My bank was able to determine immediately whether the check had been cashed (had not been), placed a cancel payment on the check, and will return the money to my account. If the check had been cashed with a falsified signature, the money could probably have been recovered by arbitration between the issuing and paying banks. At least you get your $5 worth when it counts.

Jax2 and Richingoth,
Thanks for your corrections on USPS mo's. My local post office had told me explicitly that they did not offer international money orders, and directed me to a foreign currency broker or a bank if I wanted to send money orders outside the U.S., or in any non-U.S. currency.
However, I just looked at the USPS website - they say their international money orders go just to $700, and they are valid only in a specified list of countries. The current list of countries on the website is missing most of Europe and Asia, but the website may be out of date.