my username not accepted for referrals,

My username is not been accepted for referrals , each person says it has special characters (_)

This should be no problem on another server i have a _ in my name too but i got a refer

[support4]

My username is not been accepted for referrals , each person says it has special characters (_)

If you problem is about haypi kingdom,please either go to help --> support --> contact us /kingdom management--> contact support team or to write an inquiry to kingdomsupport@haypi.com
And please give me a reply, I will help you to remove your topice to "kingdom suggestion".
If not, please tell me detail about your problem.