If a user tries to enter an email that is already in the system, it will be flagged as a possible duplicate and prevent the user from registering with the same email twice.
Optionally, you can conduct a duplicate check on multiple fields. It is important to note that when you add multiple fields in one '''Duplicate Check Field''' input, it will utilize the Boolean operator AND instead of the OR operator. For example: , if you chose email and first name, it will only flag users that have the same email and first name as an existing user in the system.
To add multiple fields using the Boolean Operator operator OR, select the '''Add Duplicate Check Condition''' button, signified by the plus sign. In that case, duplicates will be flagged if either criterion is met independently.
Optionally you can change the uniquely identifiable field such as email to another field such as employee number.