How do you effectively confront people who are spreading negative rumors about you?

I always come to the person who I believe is responsible and say something along the lines of "Hello, I've heard that you were saying that I [whatever the rumor is]... That is false information and I would like to know why you were spreading it. I also ask you to stop doing so." The key is to remain calm during the confrontation, be direct and clear, do not actually accuse someone but say that information has reached you/you heard/you saw/etc. that they were spreading the rumor. Then ask them why they were doing it and request them to stop. It's important to stay polite.

Tell them exactly how it hurts you and to their face. It's easier for people to be hurtful online so showing them that you are a person with emotions would be most effective. If you are confident, confront them in front of others to.

Be honest! Approach them in an environment you feel comfortable. Don't let anger overtake you. Be the bigger person. These rumors don't define who you are!

If it's someone who is not important to you you just ignore them, if it's someone who is important to you then you talk to them and ask them why they're doing it.

You can agree to meet this person or you could just message them asking them about the rumors and then just tell them to stop. Nothing has to get out of hand and escalate into an altercation. Just be mature about it.

In my experience, the best to way to confront them is to ask them to talk with you. Once you get that opportunity, the first thing to do is to calmly ask them why they are saying those things about you. That way, you may find out why they're doing it, and it may be something that you can work out with that person. After you ask them why, let them know how it makes you feel that they're spreading those rumors. Most people aren't really thinking about how what they're spreading is directly affecting the other person, and in my experience, just simply letting them know, helps them to understand that it's not okay. And then wrap it up, let them know that if they have a problem, that they're more than welcome to come talk about it with you, and that you would never do anything to intentionally upset them. The most important thing here is tone of voice and emotion, don't get mad, don't get upset; just stay calm and collected through the whole thing. That's how I'd handle it.

Basically I would ask them what I did that made them feel they needed to spread rumors and if it was something that made them unhappy. Then I would ask how we could talk about it and compromise or fix the situation

Sometimes you can't stop people from doing what they want to. If this is taking place at school then you have to go to the principal or even your teacher(s) because unless their underage you can only do so much.

Confront the person and tell the person about the Rumours that are not true and ask that person to stop spreading it

I will talk to them kindly to try to find out more about why they are doing what they are doing. Sometimes that is all that it takes for them to stop.