Changes in circumstances confusion.

I cant go into details right now, but I believe less people would be accused of fraud if what constitutes a change in circumstances was made abundantly clear to claimants of housing benefit. Why can't all claimants be given a change of circumstances form which should be filled in by the claimant should any reportable changes occur. A clear list of potential reportable changes should be available to tenants as part of their tenancy agreement. This would cut down on innocent mistakes being made by the tenant and would stop unnecessary accusations of fraud,and free up expensive court time. I have trawled the internet desperately trying to find a complete list of changes in circumstances to no avail. This means that a benefit officer or rent provider has the ball firmly in their court leaving the claimant open to accusations.