Referral code will not be necessary, you can refer your friend by sending your referral link, your friend must click the link and download/install and register with RummyCulture App.
However, on exceptional cases it may ask you for referral code e.g. if you are sharing the app through share it, after installing the app, your friend should enter his mobile number, after entering his mobile number click continue, and it will go to the OTP page there you will find an option call have a referral code? Your friend must enter the referral code provided by you.
We suggest that you send the referral link to your friend to download/install the App.