Appointments and changes of company directors and KMP require filing Form DIR-12 with prescribed particulars and declarations. Form DIR-12 notifies appointment, cessation and changes of directors and KMP under the Companies Act and requires particulars (DIN/PAN, name, address, designation, category, appointment/cessation date), statement of interests, and alternate/nominee details. Filings must include prescribed attachments (appointment letters, consent, resignation, evidence of cessation, court orders), be digitally signed by an authorised officer using DIN/PAN or membership number, and include a practising professional's certification who accepts statutory liability for verification.