Add Yahoo as a preferred source to see more of our stories on Google. It's fairly common for people to think sending cash by U.S. mail is against the law, says the fact-checking website snopes.com.

Add Yahoo as a preferred source to see more of our stories on Google. There are a lot of rules about what you can and cannot mail. For example, you can't mail ammo, explosives and marijuana, and there ...

While legal, sending cash through the U.S. mail is strongly discouraged due to risks of theft and loss. The U.S. Postal Service recommends using money orders as a safer alternative for sending money.