The Federal Tax Service of Russia, within the framework of performing the functions of an authorized body in cases of bankruptcy of legal entities, is vested with certain powers to protect the interests of the Russian Federation as a creditor. High requirements for high-quality support of bankruptcy procedures increase the attention of the scientific community to the problem of improving the activities of the authorized body to identify and prevent the consequences of dishonest actions of insolvency entities. The purpose of the study is to summarize the experience of the authorized body in identifying dishonest actions of the debtor and its controlling persons, preventing their consequences in the framework of a bankruptcy case, as well as developing methodological recommendations for improving the preparation of a package of evidence confirming the grounds for bringing the persons controlling the debtor to subsidiary liability. Based on the results of the analysis of arbitration practice, typical dishonest actions of the beneficiaries of the debtor's bankruptcy were identified and systematized (withdrawal of the debtor's assets, encumbrance of the debtor's obligations with artificial accounts payable of affiliated persons, implementation of various schemes (transactions) aimed at evading payment of accounts payable, etc.), methods of preventing body of the consequences of bad faith actions of the subjects of insolvency relations, as well as a methodological approach to justifying the holding of the controlling debtor of persons to subsidiary liability for bad faith actions against the debtor and independent creditors. The role of the authorized body in accompanying bankruptcy procedures is much broader than ensuring the interests of the state as a creditor, therefore, the implementation of the proposed methodological approach to the economic justification of the reasons (grounds) for bringing the persons controlling the debtor to subsidiary liability, which includes several successive stages, will improve the standards of proof in cases of bankruptcy, reduce errors of justice and, ultimately, improve the effectiveness and efficiency of the institution of bankruptcy.