I don't know how Resident tickets work, but if they can buy on-line and get a voucher, the voucher qualifies as a valid ticket media on their account.
ETA: According to MouseSavers, they can order on-line and get a voucher:
Florida Resident Discount on Platinum Pass
Florida residents get substantial discounts on regular
Platinum Passes.
- First Time Florida Resident Platinum Pass: $691.19 for all ages, including tax ($106.50 off the regular price).
- Renewal Florida Resident Platinum Pass: $584.69 for all ages, including tax ($91.59 off the regular price).
You must have proof of Florida residency to activate this pass.
First time Florida Resident Platinum Passes can be purchased at
DisneyWorld.com (you’ll receive a voucher that must be redeemed at Disney World ticket booths), or just wait and purchase at the theme park ticket booths. If you buy
online, you can make a down payment equal to the price of a non-discounted one-day Magic Your Way base ticket and then pay the remainder through 12 recurring automatic monthly payments scheduled for the year, interest and finance charge free.
Renewal Florida Resident Platinum Passes can be purchased at the theme park ticket booths, at
DisneyWorld.com, or by mail.
- Auto Club South (AAA) offers a discount on the Florida Resident Platinum Pass (first time and renewal).
