[largonioulurI]

Remember if you send a note through the mail it can be detected inside the envelope, with out opening it.
Bank notes include certain security items, such as water marks and metal strips.
The metal strip can be detected by a metal detector. Part of the security precautions in a post office, specially concerning international airmail is detecting metal objects in mail, if a metal object is detected it will be x-rayed, so any notes sent through the mail can be detected by a corrupt post office worker. Also any one who works in the postal field can carry a small metal detector to scan your mail.
I have known many people, who have sent notes in the mail and it has been surprising, how many times it never turns up, specially when postal workers know, many people send money to there relatives from developed countries to developing or third world countries
You only need one corrupt person in the postal chain to lose your money.
I don't believe the person who steals your money out of your mail needs the money, it is called criminal greed