Advarra eReg is a secure, paperless electronic Investigator Site File (eISF) system that integrates with Advarra's CTMSs--OnCore and Clinical Conductor. This centralized document management solution helps research sites improve productivity, accelerate study startup, and strengthen regulatory compliance through features such as streamlined document routing, real-time alerts for new documents, and electronic signature capabilities via Advarra eConsent. In addition to CTMS integration, Advarra eReg connects with Advarra’s CIRBI system, and internal site email systems to create a fully integrated research ecosystem. For sites transitioning to eReg, Advarra offers automated document migration, ensuring a seamless transfer of existing files and enabling immediate value from its connected technology platform.