In cases where a cardholder is being forced to unlock a door, the ability to trigger an alarm in a non-obvious way can help ensure that employee's safety. Duress PIN will grant entry while generating a Duress PIN entered event, which can be used to trigger system actions.
What you should know
To signal a duress, authorized cardholders must badge and enter their regular PIN + 1 to the last digit. For example, if the regular PIN is 1234, then the duress PIN is 1235. If the last digit is a 9, then it becomes a 0; for example, 9999 would become 9990.