Not eligible for selling a char

Hi,
I was searching a reason why i couldn´t sell my old char from Lordearon. It just says not eligible and i can´t find a section where the rules for selling are in

Your account must be premium to sell characters. So you must have donated at least once.

thank you for the quick response

Same problem here, just i donated about a month ago. Friend gave me a tip to enable 2 step security and then wait 3 days. That was 5 days ago i belive

Any tips?