Welcome to ECSI's Electronic Promissory Note site. You will be able to complete, review and print your promissory note online.A completed Master Promissory Note is required in order for the funds to be released to the school. This process may take an estimated 30 minutes. Promissory Note (SDSC CRM-137). The University will forward an award file with your accepted loan information to ECSI. 2. Submit the Master Promissory Note (MPN). At the top menu, select Loans and Grants. How long will it take? Most people complete each MPN in less than 30 minutes.