"Equal in right of payment". The pari passu principle means that all unsecured creditors in an administration (www.practicallaw.com/9-107-6363) or a liquidation (www.practicallaw.com/5-107-6770) must share equally any available assets of the company, or any proceeds from the sale of any of those assets, in proportion to the debts due to each creditor. It is one of the most fundamental principles of insolvency law.