The document provides guidance on the new Electronic Transfer Alerting Service (ETAS) system for declaring journal transfers between publishers. It describes the two-step registration process for publishers, how to declare a transfer through the ISSN extranet portal, and the validation process. The ISSN International Centre validates transfer requests and notifies publishers. It then disseminates the transfer information through ETAS and tags records on the ISSN portal. Finally, ISSN national centers validate if the transfer was completed as expected.