If you encounter online scams, you can report them to the following authorities and organizations:

1. **Federal Trade Commission (FTC):** In the United States, you can report scams to the FTC through their website at [ftc.gov/complaint](https://www.ftc.gov/complaint).

2. **Internet Crime Complaint Center (IC3):** Run by the FBI, you can file a complaint about cybercrimes and scams at [ic3.gov](https://www.ic3.gov/).

3. **Better Business Bureau (BBB):** The BBB has a Scam Tracker where you can report scams and check for scams in your area at [bbb.org/scamtracker](https://www.bbb.org/scamtracker).

4. **Your Local Police:** You can contact your local law enforcement agency to report online scams, especially if you’ve lost money or personal information.

5. **Anti-Phishing Organizations:** For phishing attempts, you can report them to organizations like the Anti-Phishing Working Group (APWG) at [apwg.org](https://www.apwg.org/report-phishing/).

6. **Social Media Platforms:** If you encounter scams on social media, report them to the platform itself (e.g., Facebook, Twitter, Instagram) using their reporting tools.

7. **Email Providers:** Report phishing emails to your email provider (e.g., Gmail, Outlook) by using their built-in reporting options.

8. **Online Marketplaces:** If the scam occurred on an online marketplace (e.g., eBay, Amazon), report it through their platform.

Remember to provide as much information as possible when reporting, including details about the scam, the scammer’s contact information, and any evidence you have. This helps authorities and organizations take appropriate action and prevent others from falling victim to the same scams.