The PTCE practice exam is set up through Pearson VUE, they also administer our actual exam. They have set up a voucher store so that you are able to purchase 10 or more vouchers and hand them out to your candidates. You do have to purchase a minimum of ten vouchers through the voucher store.
The link to the voucher store is here: Official PTCB Practice Test Pearson VUE Voucher Store
Click on the "America's Region" and the order form will pop up. You will select how many vouchers you want and enter payment information.
If you have any questions regarding the purchase of the practice test, please call Pearson VUE Customer Service at (800) 869-4101.