account been compromised mean?

Your account is currently blocked from playing Z8 GAMES from Z8Games due to Account compromised, please tell us where this account was made in Account Administration..

i traded my account for his account and it work fine yesterday, when i get home from school today this happen..
anyone know?

HE put in a support ticket saying it was stolen i guess.

For one of many reasons:

*The email of the account has been changed many times, 20+ times.
*Original owner sent in a support ticket saying it was stolen.

some other reasons I cannot think of right now, it's happened to a few of my accounts.