How to Prove to Someone That You Are Not a Liar

Co-authored by Tara Vossenkemper, PhD, LPC

Last Updated: December 16, 2022 References

No matter how hard you try to be honest, at some point, your sincerity may be placed under a microscope. Your boyfriend/girlfriend might accuse you of seeing someone else. A teacher accuses you of cheating on a test. Your parents feel completely sure you snuck out to a party last night. Being accused of something you didn't do can be terribly frustrating. Learn some tactics that might help you convince people you're not lying.

Method 1

Method 1 of 3:

Reacting After Being Accused of Lying

1
Remain calm. When you are accused of something, especially if you are telling the truth, your first reaction may be to get angry or defensive. Getting overly excited or frustrated, while a fair response to an accusation, can actually make the other person believe the accusation is true.^{[1]
X
Research source}
- Take a few deep breaths, and remember that you are trying to resolve the situation and preserve your relationship with this person, not make things worse.
2
Make your claim, with confidence. With some people, the only way to prove you are not a liar is to not prove it. In the end, you can't force another person to believe something different than what they are already committed to believing. However, you may be able to shake the person's confidence in his opinion by stating your own truth with confidence.
- Stand firm with your feet planted hip distance apart. Roll your shoulders back and lift your chest. Raise your chin and make eye contact briefly (about 5 to 7 seconds).
- Tell the person, "I see that you are resigned to believe what you think happened, but I know what happened. I did not do this, and I'm sorry you can't see that." Refrain from saying anything more, as overly explaining can be misconstrued as lying.
Advertisement
3
Ask the person what you can do to regain trust. When it's clear that you cannot convince this person of your honesty, ask for more information about why she seems to distrust you. Equipped with this information you can strive to be more trustworthy in the future.
- Whatever the person tells you should be used to change your behaviors so that you do not have trust issues in your relationships moving forward.

Method 2

Method 2 of 3:

Demonstrating Your Honesty

1
Provide evidence of what happened. The best way to prove to someone that you are not lying is to offer the person evidence that directly contradicts the claim. If you can think of any way to demonstrate your truthfulness, do so by backing up your statements with credible proof. However, in some cases, it may be impossible to show evidence that you're not lying.
- For example, you can show evidence by producing paperwork, such as time-stamps or receipts. If your girlfriend accuses you of being out with someone else on Tuesday night, it can prove your innocence by showing a time-stamp that you were using a computer in the college library until 3am.
2
Use social proof. Social proof is the concept of using others' opinions or beliefs to influence a person's decisions or behaviors.^{[2]
X
Research source} If there isn't any physical evidence, you may be able to convince the person by employing someone (or several people) who can testify to your innocence.
- For example, if your mom feels certain that you were not at a friend's house, but had snuck out to a party, you can back up your story by asking your friend's parents to testify on your behalf. If two adults--and seemingly trustworthy people--say that you were definitely at their house, your mom is more likely to believe you.
3
Repeat the chain of events in reverse order. A method often employed by law enforcement is the process of making a suspect repeat a chain of events in reverse to see if this version of a story will be consistent with the original version.^{[3]
X
Research source}
- Tell the person to ask you about what happened by starting at the end. If you are lying, you are more likely to screw it up or show inconsistencies by telling the story backwards.
4
Make a promise. Explain to the person who is accusing you of being a liar: "I wouldn't lie to you, I promise." Hopefully, if the person has any faith in you, or you haven't already damaged the trust previously, she will believe that you are being honest.
- If you have a particularly spotless history with this person, you could add to the promise by offering them examples of ways you have been honest and trustworthy in the past. For example, you might say "I have never lied to you. Remember, that time when everyone else wasn't being straightforward with you, and I did?"
- Be careful with this method, though, because some people will think you are manipulating them by making a false promise.
5
Keep your words simple. Research shows that liars often talk in more complex sentences than people who are telling the truth.^{[4]
X
Research source} Even if you are telling the truth, speaking in complex sentences can make it seem like you are covering something up or being evasive.
- Strive for clear, simple, and concrete sentences with a moderate level of detail. You might tell your girlfriend, "No, I was not with anyone last night. I was at the computer lab on campus. I can show you my time-stamp." rather than "Oh, what are you talking about? I would never do anything like that to you. I love you so much. Who could I have been with? Why don't you trust me?" All the extra questions and miscellaneous information sheds doubt on your honesty.
6
Avoid repeating questions before answering them. Another science-tested characteristic of liars is the tendency to repeat a questions before providing an answer. Avoid this at all costs. If you didn't clearly hear a question ask the person to repeat it himself. Repeating it from your own mouth makes it seem like you are delaying your response so you can think up an answer.^{[5]
X
Research source}
- An example of this happening in action could be demonstrated in this way: Your partner asks "Where were you last night?" If you say "Where was I last night?", pause, and then add "I was in the computer lab doing work," this seems less than honest because of the need to hesitate before providing your answer.

Method 3

Method 3 of 3:

Modifying Your Behavior

1
Examine past lies. If you have been known to tell a fib or two in the past, you need to carefully examine this behavior and try to learn from it. Even if you are telling the truth in this situation, you may have developed a reputation as a liar. Look at other times you have lied or been caught in a lie. Brainstorm ways you could have prevented the lies and been honest from the start.^{[6]
X
Research source}
- Once you have made the decision to stop lying, you help convince others of your truthfulness by sharing details about your life upfront. By doing this, you remove the need to be questioned, and therefore, others don't have to wonder if your answers are lies.
2
Be open. If you have trouble opening up to others, this may explain why someone is doubtful of your honesty. Learn how to be more open and honest in your close relationships by following these tips:^{[7]
X
Research source}^{[8]
X
Research source}
- Be more accepting of others and yourself. When you are constantly worried about what others will say or how they will look at you, you may lie just to say what you think they want to hear. Trust the people you love to care about you despite your flaws.
- Don't put off important conversations. Schedule time to talk about important matters when both parties are free to speak and think clearly.
- Live a life according to your values. Live your own truth, and then you don't have a need to lie.
- Embrace constructive criticism. We may lie because we don't want others to judge or criticize us for our faults. When you are able to see criticism as a tool to improve, you won't have to rely on untruths to get you by.
3
Make appropriate eye contact. Evading others' eyes is often seen as a sign of dishonesty. Eye contact is an effective way to show honesty and sincerity. You are also able to forge a more intimate connection with another person by staring into her eyes. Just be sure not to overdo it. Too little eye contact can seem evasive, but too much can seem threatening or intimidating.^{[9]
X
Research source}
- Experts suggest maintaining eye contact longer for one-on-one conversations, about 7 to 10 seconds. The amount of time making eye contact and looking away should be around 30 to 60 percent --it's okay to make more eye contact when you are listening and less when you are talking.^{[10]
  X
  Research source}
4
Be aware of what your body is saying. When we are telling the truth, we are more comfortable. In the midst of lying, we may be more uncomfortable. A liar may demonstrate closed off and unfriendly body language. On the other hand, a truth-teller will orient towards the other person, smile, nod, and uncross their arms and legs.^{[11]
X
Research source}^{[12]
X
Research source}
- Sometimes, even when you are telling the truth, you may put your guard up because someone is questioning your behavior or motives. However, the other person can wrongly interpret this as being defensive and think you're lying.
- Take a deep breath and try to relax with the knowledge that, no matter what, you know that your words are honest. Don't allow your anxiety about being questioned undermine your ability to convey the truth. Be mindful of your body language. Avoid crossed arms/legs or clinched fists to demonstrate a more friendly demeanor even when you are sort of irritated about being questioned.

Community Q&A

Question

Why do people often believe liars over honest people?

Community Answer

Liars are convincing to certain people simply by sounding confident in what they are saying. Often liars will have rehearsed what they are going to say.
Question

How can I say something without the other person getting aggressive?

Community Answer

Wait. Calmly ask the person if you can tell them something. If they say "no," then wait for a better opportunity to try again. If they start to get aggressive while you talk, then stop. Let them get it out, then ask you may speak again. It's a lengthy process that requires a lot of patience.
Question

What can I do if people still don't believe me?

Community Answer

Some people need more time than others to start trusting someone. If you recently broke this person's trust, you will need to wait until they forgive you and get over the pain. Remember, trust is earned and not given.

Warnings

Never yell at someone, when you're trying to prove things to them. Try to keep calm, relaxed, and polite, because as soon as you lose your temper, they will also get annoyed, and you won't make any progress.

⧼thumbs_response⧽
Helpful 49 Not Helpful 9