You know the feeling. You send the report, and somehow it "never arrived." You share an idea in the meeting, and by the time it reaches oga, it has your colleague's name on it. Your name keeps coming up in conversations you were never part of. You are not imagining it, and you are not being dramatic. Somebody at your workplace has decided, quietly or openly, to make your work life harder.
Before you plot anything, understand this: the goal is not to win a fight. The goal is to protect your career, your peace, and your reputation while the other person exposes themselves. This guide gives you the diagnosis, the documentation habit, and the exact words to use, so you respond like a professional and not like someone auditioning for a Nollywood scene.
First, diagnose the behaviour before you react
Not every frustrating colleague is an enemy. Some are just disorganised. Some are insecure. A few are genuinely trying to pull you down, the classic "PHD syndrome", Pull Him Down. Your response should match the actual problem, so slow down and name it first.
Rivalry and insecurity
This is the colleague who sees your growth as their loss. They are not evil; they are scared. They interrupt you in meetings, downplay your wins, and compete over things that were never a competition. Insecurity-driven behaviour is often loud but shallow, and it usually fades when you stop reacting and keep performing.
Active sabotage
This is more serious. They "forget" to loop you into emails, sit on approvals your work depends on, give you wrong deadlines, or set you up to fail in front of leadership. Sabotage is deliberate and pattern-based. One late email is a mistake; the fifth one, always on your deliverables, is a pattern.
Credit-stealing
You did the analysis; they presented it as theirs. In many Nigerian offices where visibility to management is everything, this is the most damaging one because it directly touches promotion and pay. Credit theft thrives in workplaces where work happens in private but recognition happens in public.
Gossip and character assassination
The whisper network. They cannot beat your work, so they attack your name, "he is arrogant", "she is not a team player", "that one, hmm, be careful." Gossip is the weapon of people who cannot compete openly, and it is best defeated by a reputation that contradicts the rumour.
The cost of all this is not just emotional. In the Harvard Business Review study "The Price of Incivility" (Porath and Pearson, HBR, Jan-Feb 2013), 48% of people who were treated badly at work deliberately reduced their effort, 47% cut the time they spent at work, and 80% lost work time simply worrying about the incident. Left unmanaged, a toxic colleague quietly lowers your output, which is exactly what they want. Don't hand them that win.
Why revenge always backfires
The temptation is real. Leak their mistake. Embarrass them in the group chat. Match sabotage for sabotage. Resist it completely.
Revenge does three things, all bad for you. First, it drags you down to their level, so observers can no longer tell who started it, you both just look like "those two that are always fighting." Second, it destroys the paper trail advantage; the moment you retaliate, your clean record is no longer clean. Third, it makes you emotional, and emotional people make sloppy career decisions.
Your real power is the contrast. When you stay calm, professional and documented, and they stay petty, the difference becomes obvious to everyone who matters. Let them be the loud one. Loud people get noticed by HR for the wrong reasons. Understanding the unwritten rules of your workplace matters here, and our guide on how to play office politics in corporate Africa breaks down how to build influence without becoming a villain.
Start documenting, the boring habit that saves your career
This is the single most important thing you will do, and almost nobody does it early enough. Documentation is not about building a case for war; it is about protecting the truth so that it does not become your word against theirs.
Move important conversations to email or chat. When something is agreed verbally, follow up in writing: "Just confirming what we discussed..." Now it exists.
Keep a simple private log. Date, what happened, who was present, and the impact. One line each. Keep it on your personal device or personal email, never on a work laptop you could lose access to.
Save the evidence. The email that came late, the timestamp, the version history of the document that shows who wrote what. Google Docs and Microsoft 365 both keep version history, use it.
Copy the right people, calmly. If a colleague keeps "forgetting" to include you, start CC-ing your manager on relevant threads as normal practice, not as an accusation.
Documentation turns "she is always frustrating me" (which sounds like drama) into "here are five dated instances where deliverables were delayed" (which sounds like a professional flagging a workflow problem). One gets you dismissed. The other gets you taken seriously.
Scripts: how to confront calmly, word for word
Most people avoid confrontation because they imagine it must be aggressive. It should be the opposite, low voice, curious tone, private setting. Never confront in front of an audience; it gives them a stage and makes you look like the aggressor.
For a colleague who keeps undermining or sabotaging, ask for a one-on-one and use a calm, non-accusatory opener:
"Chidi, I wanted to talk one-on-one because I value working well with you. I have noticed a few times that I get information later than the rest of the team, like the vendor update last week. I am not assuming anything, but it is affecting my deliverables. Can we figure out how to keep me in the loop going forward?"
Notice the structure: you open with respect, you cite a specific documented example, you avoid the word "you always," and you end with a shared solution. If they get defensive or deny it, do not argue. Stay flat and factual:
