Which type of check ensures that a person's registration is valid and free of outstanding warrants?

A registration check is specifically designed to verify the validity of a person's vehicle registration status. This process involves confirming that the registration is current and up to date, ensuring that there are no outstanding legal issues associated with the vehicle.

A registration check is a fundamental part of law enforcement procedures because it not only confirms that the vehicle is legally registered but can also provide information about any potential flags related to the vehicle, such as liens or other legal claims.

Additionally, while the other options pertain to different aspects of law enforcement inquiries—such as warrant checks, driver’s license validity, or potentially tracking vehicles—they do not singularly focus on the vehicle registration validity, which is the specific purpose of a registration check. Therefore, the most appropriate and accurate answer to the question is a registration check.