Notice of registered office or change requires company ID, new address, proof attachments, officer declaration and professional verification. The Central Government substituted the prescribed Form 18 for notice of the situation or change of a company's registered office, effective 25 December 2012. The form requires company identification, present and new registered addresses with effective date, police station jurisdiction, and Registrar of Companies office details where applicable. Mandatory attachments include proof of address and, if relevant, no-objection or permission documents. The filing must include an authorised officer's declaration and a professional certificate verifying company records and availability of the premises; the e-form process requires digital signature and electronic submission.