I don't understand your question at all. What voucher? You will get a Key to the World Card for each person in the room. That card is their ticket to enter the park, the hotel room key, and contains the dining credits for the room.
In the package from Disney Travel that has all of your travel information they include a $15 Planet Hollywoood food Voucher .
On the back it says" Not Valid in conjunction with any MYW package that includes dining". Im not sure if that means you can't use your dining plan and the voucher at the same time or if you can't use the voucher and even one credit at one time.
I do not know if you can use the voucher this way. The only discussion I've seen of the voucher in conjunction with the dining plan is from those who want to use it to buy an appetizer while paying for their meal with the dining plan. It's suggested they buy the appetizer at the bar instead of at the table because the restaurant won't let you put it on the same check if you're using the dining plan. Don't know what the result will be if the diners are split - one using DDP and one not using DDP - because then the checks are split.
If you're planning on having one person order with the voucher and the other with DDP, and then share both items, I don't know whether that's OK with the restaurant or not.
Thanks for the info. Maybe if my dad uses his dining plan and I use the voucher it will work. My name is the primary on the package so it would be my name on the voucher.