Offices will be expected to undertake both targeted and random verifications to detect
and deter fraud. The number and percentage of cases subject to verification should be
high enough to act as a meaningful disincentive to those who would attempt such
practices.
...
Interviews, site visits, and telephone checks have proven to be the most effective ways
to detect and combat fraud. The information gained at interviews where fraud is detected
will help officers to identify current trends and patterns and to refine their profiles for
ongoing use.