If their is an option to ship the ticket not vouchers but actual tickets than you will be okay but if you get vouchers or will call you must show an id that matches the DVC member card to keep the DVC prices.
Official policy is that special event tickets are to be will call pick up only. The will call option requires the member to show their DVC Member Card and Photo ID.
Unless Disney has changed it, the on-line purchase option was allowing you to select the option to have them mailed out.