Can I combine my referral rewards? 05 June 2023 01:45 Updated No, discount codes can not be combined with other discounts, sales or promotions. Related articles How does the Koala Refer a Friend Program work? I didn't get my reward for referring my friend? My friend's discount didn't apply? Can I use discount codes when products are on sale, including the 'Welcome' discount? My friend didn't get their referral link, what do I do?