Mailing Threatening Communications 18 U.S.C. Sec. 876 (b) is a federal law that makes it a crime to knowingly and willfully mail any communication containing a threat to injure the person or property of another. The law was enacted to protect people from being victims of extortion or other threats. The law applies to any type of communication sent through the mail, including letters, emails, and packages. Types of Mailing Threatening Communications 18 U.S.C. Sec. 876 (b) include: • Extortion: making a threat to injure another person or their property in exchange for money or some other form of benefit. • Harassment: repeatedly sending threatening communications to someone. • Blackmail: threatening to expose embarrassing or damaging information about another person unless they pay money or do something else. • Intimidation: sending threatening communications to another person to scare or intimidate them.