UIN applications for UN bodies and embassies require electronic submission, authorised signatory details, documentary proof, and verification. Granting of a Unique Identity Number (UIN) for UN bodies, embassies and other notified persons requires prescribed identification fields for the entity and authorised signatory, upload of documentary evidence proving authority to represent the entity, and electronic submission through the common portal or suo moto grant by a proper officer with required electronic signing and a verification declaration.