There will be a whole bunch of us getting fp's on Tuesday, Oct 4th.
I just bought the Halloween party tickets yesterday so it is fresh in my mind, mostly.

After you pay for the tickets you will get three options for delivery.
1. email voucher
2. expedited delivery - super fast for extra cost
3. regular USPS delivery
The second and third choices will give you the hard cards, the voucher won't. But all three methods will have your party tickets show up in your
MDE account, which means that you can use your Magic Bands to get into the park even if you have the hard tickets. I always like to get the hard tickets because I like to get Disney stuff in the mail.

But someone can use either the MB's or hard tickets, it doesn't matter as long as the tickets show up in their MDE account.