One side is blank, whereas other side has printed design or picture. Customer selects a design for the invitation card. Then text is composed and printed. This text is printed on the blank side. Thus multiple copies of cards are created.
Same procedure is applicable to the web based invitation cards.
But there is no printing on paper. The cards are created on web and dispatched through e-mail. All of your friends and relatives should have e-mail addresses. Select the design for your Invitation Card. Draft the message of invitation.