Some patients may have been put into mental institutions without knowing they had the right to see a judge beforehand, the Ombudsman said. Alice Tai Yuen-ying's assessment came after her office found a complaint against a public hospital doctor to be 'unsubstantiated'. It was claimed the doctor had falsely stated a patient had relinquished his right to see a district judge or magistrate when he had not actually been asked. The Hospital Authority admitted during an investigation that the doctor had not informed the patient of his rights before issuing the medical certificate for his removal to an institution. However, it said the Mental Health Ordinance did not require the doctor to do so. Ms Tai said the original purpose of the Mental Health (Amendment) Bill, passed by Legco in 1988, was to stipulate that a doctor should inform patients of their rights to be brought before a judge. 'However, the present complaint has shown the administration and Hospital Authority have failed to put in place the necessary administrative measures in accordance with the purpose of the bill,' she said. The Health and Welfare Bureau has agreed to implement such a measure in the near future. Meanwhile, the Housing Department headed the list of the 10 government organisations the public complained most about last year, according to figures from the Ombudsman. The Ombudsman's office received a total of 3,101 complaints for the year to June 15, down 24.8 per cent from the year before. The Housing Department came top, with 410 complaints filed against it - 14.7 per cent of all complaints. Ms Tai denied the drop in the number of complaints was caused by a loss of public confidence in the Ombudsman system, claiming it was more to do with a better understanding of the scope of the office. The Ombudsman will start a probe into the management of government crematoriums in response to allegations of thefts from coffins at the Cape Collision Crematorium at the end of last year.