Board Thread:Roblox help and discussion/@comment-34514626-20190426050943/@comment-33939215-20190427000214

I'd recommend contacting Roblox at www.roblox.com/support or email them at info@roblox.com.

If you have an already-used Roblox card, use that as proof that you own the account. However, this is the only proof you can give them without them getting suspicious. '''Do not give them your password or username. '''Only the mentioned criteria above.