Does CPL Prepaid offer a referral program? Yes, CPL Retail Energy wants to reward our customers who share how great CPL Prepaid is with others. Once your enrollment is complete you will receive a referral number. This referral number is all you need to refer others and get rewarded for spreading the word! Once someone you refer enrolls and uses your referral number you will receive a $20 credit on the 30th day of service. Only those who enroll online or by phone can participate in the referral program.