You can still use the existing account, so when you buy a used copy you must/should warn the seller that he/she must write down his account information (user and pass). When you got tha game you just change (manage account) the pass (and other information) with your own.
Slashdot Mirror
You can still use the existing account, so when you buy a used copy you must/should warn the seller that he/she must write down his account information (user and pass). When you got tha game you just change (manage account) the pass (and other information) with your own.