Buying multiple distinct JRpasses in one order

Hi,

We are a group of three people that want to buy JR passes. We will land in Japan on separate dates (two people in early march and one in the end of march).
We would like to make one order for the three of us. We would like to know whether there are three separate vouchers (one per traveler, so in that case each can use its own voucher), or there is just one voucher for all of the travelers (and in that case we need to separate the orders)

Thanks!