If you work for a large organisation, the chances are your company has a "whistleblowing policy" that enables you to report malpractice, fraud and criminal activity, without fear of repercussions or reprisals. For this to work, it is run by an external organisation. Strange as it may seem, Trades Unions have no legal requirement to have such a scheme in place. As such, they are open to all sorts of issues. Given the tribal nature of the organisations, can this be healthy in the 21st century.
My good friends John Burgess stood for the post of General Secretary last year. A tape was released of what appears to be paid Union officials allegedly organising campaign activities against him and other candidates. I strongly suggest you read Johns blog about the subject, just so you see why all organisations should take Whistleblowing seriously.