What is the difference between a Hanging Parking Pass and a Windshield Decal Parking Pass?

We hate to say it’s obvious, but they sort of say it in their name: Hanging Parking Passes hang from your rearview mirror and Windshield Decals stick to the inside of your windshield. We only recommend hanging passes for low security and single use events, while windshield decals are perfect for high security, long term use is important.