Credit losses, has been repeatedly identified as the principal cause of the failure of the bank. However, the extant literatures that examine the determinants of bank credit losses are still very rare. One is the structure of family ownership. In fact, 70% of banks in Indonesia are very concentrated on family ownership thus this condition may cause the entrenchment effect of family ownership on minority shareholders. Hence, the main purpose of this study is to investigate the influence of family ownership and government ownership on credit losses. Other determinant that being investigated is the possibility of non-linear effect of banks size on credit losses. This study used the generalizedmethod-of-moments (GMM) estimator developed for dynamic models of panel data. By using the Indonesian banking data from 2004 to 2014, the results shows that the bank with family ownership has a greater credit losses than other banks (non-family). However, this study fails to find the influence of government ownership on credit losses. While, the relationship between bank size and credit losses is linear and this study fails the non-linear relationship between the bank size and credit losses. The implications of this research are Financial Services Authority should enact and enforce the regulation that mitigate the expropriation of family ownership and consequently, the credit losses of Indonesian bank will be relatively reduced.