* To find your Performing Rights Organization affiliation information, you will need to go to your organization's website and search for your name in their repertory database in order to find your IPI/CAE number. An IPI/CAE number is a nine-digit international identification number assigned to songwriters and publishers to uniquely identify rights holders. You may see your IPI with two zeroes in front of it on your PRO's website. If you are not registered for a PRO as a song writer we recommend doing so ASAP.  **IPI is a code made up of eleven digits assigned to the name (or pseudonym) of a natural or legal person. Such a person may have several names.