As long as this forum isn't built on technology that hasn't been updated since the 1990's, administration should have the ability to change a user's username.Not sure if it's possible, at least I don't see a way to do it. Maybe the forum owner has more advanced controls than would allow it.
This is a 4 years old post, and the user hasn't been online for two years now.Were you able to request the username change?
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