To maintain the integrity of your data, it’s a good idea to have rules in place to reduce duplicate records in the system.
1. Go to Form explorer.
2. Select the form you want to create the duplicate rule for, then click on
Duplicate Rulesmenu item from the toolbar.
The duplicate rule designer opens with a single rule created for you.
4. Add a rule name in the description box.
5. Add rule. To Add rule:
Select a field from the list.
Enter message to show to the user.