IPI (Interested Party Information) — also called CAE (Compositeur, Auteur, Éditeur) — is the unique 9-11 digit number that identifies a songwriter or publisher across all PROs and CMOs globally. Issued by your PRO when you affiliate.

Every CWR work registration and every royalty distribution uses IPI numbers to match works to the people owed money on them. A missing or wrong IPI means royalties get held as "unmatched" until ownership can be verified.

IPI follows you for life and across PROs. If you switch from BMI to ASCAP, your IPI stays the same. If you operate as both a songwriter and a self-publisher, you typically have two IPIs (one for each role).

Every writer working with Producer Tour provides their IPI as part of onboarding — without it, foreign society + MLC registrations cannot proceed.