Which document indicates that a vehicle has passed safety and emissions checks?

The document that indicates a vehicle has passed safety and emissions checks is the compliance sticker. This sticker serves as a physical representation of the vehicle's adherence to the mandated safety and emissions standards set by the relevant authorities. It is usually affixed to a designated area on the vehicle, making it easily visible for inspections by law enforcement or regulatory bodies.

In the context of the other provided options, the vehicle registration establishes the legal ownership and registration details of the vehicle, but it does not confirm compliance with safety and emissions standards. The certificate of title serves to document the ownership history and legal standing of the vehicle, while the clearance certificate typically refers to a document that confirms that a vehicle is free from any legal issues or claims, rather than specifically addressing its safety or emissions status. Thus, the compliance sticker is specifically designed to show that a vehicle has met the necessary requirements in these critical areas.