Koa authors earn $25 publishing credit for each paid first-time author's regular-priced publishing package referral. Four is the maximum for paid referrals. The referral reward is valid up to 12 months after the referred author's first paid publishing package has been completed and the book has been launched. A publishing credit voucher will be awarded upon the completion of this process. The credit must be used within the same 12-month period as a discount towards a publishing package. All credits must be submitted before publishing agreements are drafted and signed.