His CD key registered with the IP of an Esporter account; one of the ones we banned for multiaccounting, exploiting, leeching, circumnavigating bans, cheating in strategus and harassment.
So, two possibilities then;
1: He is lying to you.
2: He knowingly allowed an Esporter to cheat using his CD key.
Both possibilities are met with the same action: Provide essay(s) on given topics and after we receive them we will consider lifting the ban.