Is there a step by step tutorial on does Ardor's transaction vouchers work?

When creating a transaction voucher on Ardor. Say alice wants to pay bob.

Alice logs into her own account and and puts in Bob's address and 9 ignis to send.

Alice also puts in her secret pass phrase and checks off the voucher checkbox.

Now click submit and you're given a QR code and json data.

So does bob just broadcast this transaction when I give him this voucher?