Can I include money in my envelope that I'm sending to Japan?

Question:

I'm mailing my friend in Japan a letter, I was wondering could I include like a 20 dollar bill inside the envelope along with the letter. I'm just trying to avoid any complications. Thanks :)

Answer:

Is there a reason for wanting to send them $20 ? There's no laws that say you can't send money in the mail. There are international money orders available if it doesn't have to be a 20 bill. Many years ago I had a pen pal in Canada who sent a couple of $20 bills.