The toll tag is personal. If you just take out the tag from the car, and do not terminate the AutoPASS-agreement, you still have to pay for the passings to the old car
You terminate the AutoPASS-agremment on your sold car at My Page.
Have you bought a new car, or going to buy a new car? Take care of the tag, and you can use it on the new car. Remember to register the car number of the new car on the AutoPASS-tag.
If you are not going to use the AutoPASS-tag on a new car, you can thorw it away as electrical waste