Ya, I had an account like that that was in debt for about a year >.< it sucks, haha. But there would be little to no proof that the account is what you say it is. Idk if it's high level or has good stats or whatever, but now that the hiscores are messed up there's no way to tell what the stats are. You can log into funorb with the account, since I'm sure it's just runescape debt you have. That would be one way to show that the account itself it real.