An email invitation is an electronic means of sending an invite to a person or a group of people (come) to a particular event. It is the technological version of sending an invitation mail. Most people turn to this method because of various reasons. One of them is cost-effectiveness. Unlike the (tradition) invitation, you have to spend a considerable amount of money to print invitations plus an additional cost to send them. By using formal email in PDF, all you need is a digital graphic print, typewritten words, and internet to send to everyone.