Unsecured loan given i have ledger with seal and sign

My dad had given an unsecured loan in trenche every year. We don't have any legal agreement or cancelled cheque or any other documents. We have the bank entries by which we had t/s. The other party has shown interest on yearly basis and deducted tds on it. It is reflecting in 26 as. Additionally we have the ledger where he has signed with seal. Now can be file recovery suit basis of above. And above evidence are enoughbor not as we don't have any other evidence