Dear friend,Actually it is not illegal. My wife and son sent their passport from manila to calgary via fedex. You just have to declare that what you are sending is your passport. In fact fedex will even check what you are sending and they'll indicate that it is passport
Thank you so much for your message.
But indian passport we cannot send by post or courier , it is clearly written on the passport last page.
We can send it with a relative or trusted friend with an authorization letter.
This is what I understand today.