This week I sent an application form off for a post at a local college. On the form they are asking for my National Insurance number. It has been some eight years since I have completed an application form I was wondering if this is now normal practice? Can I assume that the organisation have a legal obligation to shred the form if I am not selected for interview? After all, I do not know who has access to it, how long or where it will be kept and they now have my identity. If I see this in future do I have a right to withhold my N.I number at this stage? Any advice would be most appreciated.