Operational creditor insolvency initiation requires unpaid debt, no dispute notice, and complete application before admission. An operational creditor may initiate a corporate insolvency resolution process after ten days from delivery of the demand notice or invoice if payment remains unpaid and no dispute notice is received. The application must be filed in the prescribed form with supporting documents, including the demand notice, an affidavit of no dispute, and proof of non-payment where available. The Adjudicating Authority must admit the application only if the statutory conditions are satisfied, or reject it where the application is incomplete, payment has been made, a dispute exists, or a proposed resolution professional faces disciplinary proceedings. The process commences on admission.