This has been discussed before - it seems you could give it a try
(especially if you show up first thing in the morning) but is not
guaranteed.
The worst that could happen is that they just send you away and tell you
to come back on your booked date.
Originally posted by Claire23
Just wanna know too if that's possible. They gave me an appointment 5
weeks from the day I made the appointment and wondering if I could just
show up and do my fingerprinting together with my receipt.