WREGIS is an accounting system designed to issue, register and track renewable energy certificates (RECs) for use in verification of compliance with state and provincial regulatory and voluntary market programs. The system can be accessed by both registered account holders and public users, but the functionality available to registered users is much higher than that available to the public. WREGIS account holders can manage their individual REC portfolios in one account; the same account will have numerous available sub-accounts into which the portfolios can be organized.