Can i let my brother play my wow accont?

Q u o t e:
if on the same computer nobody will know if its u or ur brother playing..

Perhaps, Pinoccio. Technically though an account can only be accessed by the adult registered to it and one minor child that the adult is the parent or legal guardian of.

We don't allow account sharing for several reasons and many of those reasons would be to protect the registered user. Siblings, spouses, boy/girl friends, etc... have been responsible for a number of activities that have left an account without a character, equipment or gold not to mention the possibility of the account receiving a penalty for violating the Terms of Use.

Good luck, Eroya.