Appeal to the Minister of Immigration?

Recently there has been some cases in the news of families fighting deportation and we also often get people who when their application gets a PPI letter (a letter from the case officer questioning some detail in the application) their impression is a that writing a letter to the minister will help their case.
While writing to the Minister may help in some special instances, in most cases it has absolutely no effect. When you want to argue that you are right and the immigration officer is wrong, you need to do so from a legal standpoint first. There is a process for appealing to the Minister and you need to have some very special reasons for your case to be considered
INZ hear so many sad stories of how, "My life will be ruined if I can't stay in NZ", that the chances of them believing yours and changing their minds on a potential decline are very slim. In most of the cases picked up by the media of families who are liable for deportation because one of their children are sick or perhaps someone committed a crime or lied on their application. However much they beg and plead with INZ or the Minister, it is very unlikely to have any effect
The application process is all about showing you meet the criteria for the visa you are applying for, and underlying this is showing you meet all the details of the immigration law which defines the criteria. So when you have problems with your application, then only way to address them is to go back to the legal foundation of the problem and show how your situation or documentation fits this.
For example if a client is applying for a work visa and the employer hasn't advertised the position properly, the application will be PPI'd if on shore and probably declined if offshore. The only way to save this application is to provide some clear documentation which shows that advertising was done, or some other very strong evidence that New Zealanders are not available for this work. The response to the PPI must satisfy WK3.10 and WK3.15 that no suitable New Zealanders are available and that the employer has made genuine attempts to recruit New Zealanders first. The whole response needs to be focused around the details of this part of NZ immigration  law, a letter to the minister explaining how you really need this employee will not help the situation.
The best way of course is to make an application that already clearly shows you meet all the criteria set out in the law. A strong application will always have a better chance at success than trying to justify why you are right after being given a PPI.