Building management organizations should adopt the following preventive measures:

- Establish clear criteria and standard, and keep proper records in selecting suppliers or contractors and accepting goods, services and work;

- Establish clear payment and fee collection procedures, and maintain accounts and related financial records properly with audit;

- Document properly the issue of parking labels or resident cards which should be serially controlled with regular patrol and surprise checks to detect malpractices;

- Draw up clear policy and keep proper records on allocation/rotation of duties/overtime, posting and shifts, and conduct surprise checks.