What is 'confidential petition & addendum' in regards to divorce proceedings?

Full Question:

Upcoming divorce hearing docket says: 1) 'summons & petition' 2) 'confidential petition & addendum' 3) 'original certificate of divorce or annulment' My question is, what is #2?
03/28/2009   |   Category: Divorce   |   State: Wisconsin   |   #15805

Answer:

In Wisconsin, a confidential addendum is filed with the divorce petion to provide a method for individuals to provide information concerning social security numbers in a confidential manner. This addendum lists information about the parties' names, birth dates, phone numbers, and social security numbers, as well as such information about children. In this manner, the court may gather the required information without it becoming part of the public record and being able to be viewed by anyone.