A former manager used forged documents obtained from colleagues to help him to secure a better job. Tsang Ping-yim, 45, worked for at least three firms for nearly five years until he was caught. The defendant, who is only a Form Six graduate, used the fake certificates to claim he had earned a business administration degree from the University of Hong Kong. He also said he had completed three management courses held by the Hong Kong Management Association, the District Court heard. He admitted forgery and using a copy of a false instrument. Defending himself, he told Judge Richard Hawkes he had been foolish. 'My heart has suffered a lot and I worry about my future,' he said. Tsang, married with two young sons, said he was driven to the crime because he wanted a better job with a higher salary. In 1989 he was employed as a personnel manager with Wyse Technology Limited and had access to academic and professional certificates, prosecutor Philip Tang said. He made copies of four certificates and put his name on them. Between 1990 and 1995, he used them to obtain jobs with at least three firms at managerial level. Tsang was arrested last October after police received a tip-off. Sentencing was adjourned until August 14 for reports.