How to obtain Non Traceability Certificate from Police without signat

In Tamil Nadu, two brothers had jointly bought an agricultural property. Both brothers are no more. Property document is held by legal heirs of younger brother. Heirs of the elder brother have obtained leal heir Certificate and need property document to sell their 50% share jointly held by them. Family of younger brother have refused to share the original document. Duplicate Certificate for land document can be obtained from Sub Registrar on submission of Non- Traceability Certificate from Police Department. As per order issued by DG of Police vide "Rc No2029209/Gen1(1)2022 dt 1-4-2022", application for Non-Traceability Certificate for lost document can be made by any of the legal heirs along with NOC from all other legal heirs. Legal heirs of younger brother holding the original refuse to sign the NOC for application for Non-Traceability Certificate. Query: How to obtain Non Traceability Certificate from Police without signatures from legal heirs of younger brother?