Malicious Coworker Keeps Taking Credit for Other People’s Work: ‘By the third time, I started keeping copies of everything I sent’

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Olivia Arocena • Writer and Editor
Oct 24, 2026 9:45 AM EDT

When your coworker is a credit thief

Some people have mastered the art of looking busy while secretly looking for ways to steal credit from those who are actually doing real work. Don't get me wrong; they invest a lot of energy in it, and it becomes a full-time job, but it would be more ethical to invest all that energy into actually working.

They'll be the first to volunteer to present work and say, "We've been working so hard on this," while everyone thinks: "We?" At first, it might go unnoticed, but reality always catches up to them, and everyone on the team ends up hating them and/or taking revenge.

Many office achievements are reserved for those who successfully advertise their accomplishments, not necessarily for those who objectively accomplish more.

These credit thieves are generally very quick to put the "I" in work they never participated in, and even quicker to throw a "we" when there is a mistake. It's all about enhancing their good qualities and hiding those not so good. We all do it, to some extent, but there are limits.

They usually take advantage of the fact that not many people like conflict or confronting others, and they use that to thrive. But if they steal credit long enough, it will likely backfire, and when it does, every team member will be there, happily watching.

At work, your intellectual credit can grant you a better position, more responsibility, more money, and many other cool improvements. The thing is, eventually, if a credit thief gets any of those, they won't be able to perform at a higher level, and that's when the mask will drop. You can't steal your way out of work as you go up the ladder and take more responsibility; at some point you are going to be confronted with actual work, and you won't know what to do.

I have to say it, I actually believe in confronting people, and I don't understand why it has such a bad reputation. I've done it many times, and when you do it on time and assertively, it can save you years of stress and petty fights.

I used to have a friend in college who copied my every move, to the point that it became weird to everyone but her. At first, I didn't say anything because I thought it was my imagination, but when it became evident, I immediately brought it up to her, and it was like the spell was broken. Of course she denied it, but it probably made her so embarrassed that she dropped it the next day.

Confrontation works wonders, if you do it well. If I had to give you advice on that, I would say you have to be very respectful and try to keep it short and to the point. The most important thing is that what's bothering you stops being a weird taboo that grows without anyone noticing.

Once you put it on the table, you can do something about it. So good luck confronting anyone you have to confront!

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  • Cheezburger Image 10672752384
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    The coworker finding things to take credit for

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  • My coworker kept taking credit for my work until one small mistake exposed everything

    I never thought I'd end up having workplace drama worth writing about, but here we are. I work in a small office where everyone knows what everyone else is doing. There are only
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  • about twelve people on our team, so when something goes wrong, it usually doesn't take long for people to figure out who was responsible. For the first year, I got
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  • along pretty well with everyone. Then a new coworker joined our department. I'll call him Mark. Mark was friendly,
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  • confident, and very good at talking during meetings. He always seemed to know exactly what to say whenever our manager asked for updates. At first, I thought he was just one of those people
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  • who was naturally good at presenting ideas. Then I started noticing something. I'd spend hours preparing report, send it to the team, and the next
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  • morning Mark would explain the same findings during a meeting as if he'd put the whole thing together himself. The first time, I assumed it was a misunderstanding.
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  • The second time, I was annoyed but didn't say anything. By the third time, I started keeping copies of everything I sent. I wasn't trying to catch him
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  • doing anything. I just wanted a record of my work in case there was ever confusion about who had done what. A few weeks later, our manager asked us to prepare a presentation for
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  • an important client. I was responsible for the data and analysis. Mark was supposed to help with the slides and final presentation. I finished my part two days before the deadline and
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  • sent him the files. The next morning, he told our manager that he'd spent most of the previous evening analyzing the numbers and had found an important trend. It was the exact trend I'd
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  • identified in my report. I sat there listening to him explain it, trying to decide. whether to interrupt. I didn't. After the meeting, I asked him privately why he'd
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  • presented my work as his own. He laughed and said we were on the same team, so it didn't really matter who presented which idea. I told him it mattered to me because our manager was
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  • evaluating our individual contributions. He said I was being too sensitive. I left the conversation feeling stupid for even bringing it up.
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  • Then came the presentation day. Everything was going smoothly until our manager asked Mark to explain one of the figures on the second slide. Mark stared at the screen
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  • for a few seconds. Then he gave an answer that didn't make sense. Our manager asked him to walk through the calculation. He couldn't.
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  • I could see him getting nervous, so I stepped in and explained the numbers. I also pointed out that one figure had been updated in the final version because the original data contained a duplicate entry.
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  • Mark looked at me like he wanted me to stop talking. After the meeting, our manager asked me to send her the original report and the updated calculations.
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  • I sent them, along with the email showing when I'd completed the analysis and shared it with Mark. I didn't add any accusations or explanations. I simply sent the files she requested.
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  • The following week, our manager called us both into her office. She asked Mark to explain how he'd divided the work on the project. He gave a vague answer.
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  • Then she opened the report I'd sent her and asked him why he'd described the analysis as his own when my name was on the original document.
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  • For once, he had nothing to say. I expected the conversation to turn into a huge argument, but it didn't. Our manager simply clarified who had been responsible for each part
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  • Cheezburger Image 10672752640
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    The sneaky coworker taking notes.

    Model portrayal

  • of the project and told us that future assignments would require clearer documentation. Mark barely spoke to me for the next few days. Honestly, I was relieved.
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  • I never wanted him to get fired or anything like that. I just wanted my work to be recognized and to stop feeling like I had to compete with someone who was taking credit for it.
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  • Since then, I've made a habit of documenting my contributions and keeping communication clear. Not because I distrust everyone, but because I've learned that good work doesn't always speak for itself.
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  • Sometimes, you have to make sure there's a record of who actually did it. Have you ever worked with someone who constantly took credit for other people's efforts? Did you
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  • confront them directly, or did you wait until the situation became impossible to ignore?
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  • C
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    The coworker finding inspo.

    Image for illustrative purposes

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