Divorce Online has published this handy article containing tips on finding Unreported Income and Hidden Assets.
A couple of highlights:
do a cost/ benefit analysis before pulling the trigger on forensic accounting investigations
where a spouse / parent is not forthcoming, subpoenaing a third party is a relatively productive, reliable and inexpensive way of obtaining certain information
is the spouse / parent’s lifestyle consistent with the income and assets reported?
is the financial picture of the spouse / parent’s business consistent with similar businesses?