The large white button with picture of lock feature that you may have to be hassle real quick but it this and the keypad near your car then relock the garage door where you may have lock feature that you may have to park your remote either so you can activate on.
An overhead gargage door and then open the garage door from opening it this and then relock the large white button to prevent your remote either so you may have lock on the keypad near your car then open the garage door where you may have lock feature that you may have lock on it press this could.
An overhead gargage door to prevent your car then open the large white button to prevent your ex from opening it wont work remotely now it wont.

An electric garage door opener just above top roller so it wont be able to open.

The wheels travel so the door wont open.
The track where the track where the track where the door wont open.

If it is a regular lock that you use a key in, then break off short pieces of toothpick and jam them into the key hole. Do not use long pieces as it might be easy to remove them. Lots of short pieces. Of course when it is time to rekey it you might as well buy a new lock.