Re: Used copy of The Sims 4
No, you have to see it their way. With earlier games people could lend out the game to anyone they wanted and install it on multiple computers.
What means a lot of lost money for EA.
You bought the game on DVD and the box was not sealed/it's a used game
Used games cannot be re-registered. Take it back to where you bought it and get a refund.
Source: http://answers.ea.com/t5/The-Sims-4/FAQ-Serial-Codes-Game-Activation-and-Download-Issues/td-p/4228232