Anson Chan Fang On-sang said the decision of opponents to dust off 14-year-old allegations concerning a property transaction amounted to a smear campaign against her and her family and had been unforgivable. She insisted she had nothing to hide and would co-operate with any Legislative Council investigation. Two weeks before Sunday's by-election, several newspapers reported a call by a former top graft fighter for an investigation into allegations Mrs Chan was able to obtain a 100 per cent mortgage from Hang Seng Bank to buy flats in 1993. At that time, the Monetary Authority advised banks against issuing mortgages of more than 70 per cent. Newspapers also reported details of a recent flat purchase by Mrs Chan's daughter. Mrs Chan responded by repeating what she had said when the allegations about the 100 per cent mortgage were first aired - that she had not abused her position. Yesterday, she said: 'What I found particularly unfortunate is that it involved my family ... I think it is really quite unforgivable for people to cast aspersions and to impugn the integrity of my family members. That is totally uncalled for.' Mrs Chan said that, rather than affecting her vote, the allegations may have rebounded on her rival Regina Ip Lau Suk-yee. 'I think with this deliberate intention to smear ... the more you say, the more ammunition you give them.'