Hi! How to Invite Paradise Island friend and use gift codes? 1 Click on the lower right button on your Paradise Island homescreen with the 3 people. 2 Sociality screen will open. 3 Click in Invite Friends button on the bottom...enter their username(not their island name). BONUS PIASTRIES AND MONEY 1 Click on Services tab 2 Click on the Friend code arrow. 3 Enter friend code of 6 digits.(search the web, they are all over the place.) This will give you piastries and money! Note: you can only use the friend gift code once.