An Investigation form is the form that is used for your users to answer any queries that have been raised during the complaint. After you build the initial complaint form follow the steps below
Step 1: Go back to the main table and select the radio button to the right of your check & select Edit Investigation Template
Step 2: Follow the steps above that you used to build the actual Complaint Template to build the Investigation Template. The same functions are used. Your form may end up looking like this example.