What information should we provide regarding the planned migration?

The earlier and more complete the information, the smoother the migration. At a minimum, let us know: scope of migration (all charge points, all sub-CPOs or partly), from which interface to which new interface (from one roaming platform to the other, from roaming platform to direct OCPI connection, from one CPMS to another, etc.), changes in technical, commercial and operational set-up such as: CPO IDs, CPO names, billing party, accounting data if new (address, Tax ID, bank account etc.), timeline. This requires at least 2 weeks' advance notice. Delays in communication are one of the main risks in any migration, so don't wait until everything is finalized before reaching out.