OP, the perfect solution is mention by DdmrDdmr but also have consequences so I will advice you to be well prepared.
I will advice you read and understand forum rules in every setting next time so you won't get into things like this.
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If that is a concern, you should try to provide your proof to the person who gave you the negative trust, which he may or may not believe. Be as clear and explicit as possible depicting the events and providing the proof you say you have. Nobody else will be able to remove that negative trust, although you could also open a thread in
Reputation to defend your case publicly. Bear in mind that this sometimes turns out wrong, as the debate sometimes leads to more people distrusting the defendant due to the proof provided by one party or another.
Regarding your first negative Trust from 2017, that is going to prove to be even more difficult to tacle, since @Vod has declared having left the forum.
I don't understand how the issue start but he left because he have a lot to do and also because of an old issue that happened between him and the NastyMan. He said he has officially started his own business, no longer need any investment in the corporation but will come back once he get a certain amount of coins
Matthew embezzled.