“…RESULTS The modified opinions collected in the available reports allowed us to identify eleven recurrent factors related with: noncurrent assets, amortizations, subsidies -investment, equity investments, inventories, debts to receive, impairments, debts to pay, provisions, cost accounting system and internal control (figure 1). The factors found are in line with the conclusions of [11], which also highlight non-compliance with accounting standards and deficiencies in internal control as factors with a significant impact on changing the auditor's opinion. From these eleven factors, we will highlight the six predominant factors in the last years, namely non-current assets, amortizations, subsidies -investment, debts to receive, impairments, debts to pay, equity investments and provisions.…”