When you set up your account on evee, you will have a referral code generated for you. To find your referral code please first sign into your evee account and go to "Account" > "Referral".
Use your code to invite friends who aren't on evee yet. They'll get A$75 off their first trip and when they complete the rental, you'll also get A$50 in credit too.
You will also be able to see how much credit you have accumulated from referring friends and family which you can use on your next trip!
For more information about how to use your code properly please have a read of your evee's Referral program Terms and Conditions.