discuss a problem

Have you ever felt that an expressed idea of yours (a thought spoken or written; a solution to a problem; a creative work; a research paper, etc.) was “borrowed” by someone else and you weren’t given the proper credit? Or conversely, that something you received credit for couldn’t have happened without the hard work of someone else? I’m not interested in catching anybody in some sort of admission of guilt here, so it’s perfectly appropriate to use some else’s experience for purposes of the discussion. What I want to know is, how did you (or whoever) deal with this situation and what you think as you reflect back was the fairest way to resolve the issue?