Do i need an appointment for a release of liability

You don't need an appointment but it sure speeds things up. If its a vehicle release of liability, I have been able to do that online. Another thing you might try is calling mid morning and if there is a long wait the will call you back and they could walk you through the paper work of what's needed. Maybe you don't need to go in. Calling was very helpful in my case

No but its faster if you check in online