Only for certain things, like signing up for benefits. If you try to make an appointment for getting a new card, you'll schedule a specific type of appointment which means you'll wait 1 to 2 months for the appointment. If you just need a new card or to change your name, it's best to walk in.
It may take a while if you don't come right when they open
No. You walk in, sign in on the kiosk and wait for your number to be called
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