First, your friend needs to sign up for the referral program by heading to www.threadbeast.com/refer. 

Once signed up for the program they will be given a unique link and code. They can then share it with you and it will look like the picture below:

You will need to sign up under the unique link and code in order for your friend to receive credit. If you use both the link and code, your friend will receive referral credit and you will receive a few bonus items on top of your first package!