FBI也鼓励告密的，看FBI的网站：

Please contact your local FBI office or submit a tip electronically if you have information about:

• Possible acts of terrorism, including violence, funding, or recruitment;
• Persons sympathetic to terrorists or terrorist organizations;
• Suspicious activities that you believe threaten national security, especially suspicious activities that involve foreign powers or foreign organizations;
• Computer crimes or intrusions into computer networks, particularly those associated with national security;
• Corrupt activities in state, local, or federal governments or in law enforcement;
• Racial or hate crimes, human trafficking (involuntary servitude or slavery), or other civil rights crimes;
• Organized crime activities;
• Financial crimes that involve fraud, especially corporate fraud, mortgage fraud, or other investment fraud schemes where significant dollar losses have occurred, including those impacting you or your place of work;
• Fraud in the health care industry;
• Persons who have committed or are planning to commit bank robbery, kidnapping, extortion, or thefts of valuable art, large interstate shipments of goods, or monetary instruments; and activities of violent gangs.