Expense audit reason: Duplicate expense item trigger

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Hello,

Based on the Oracle documentation:

"Audit expense reports for duplicate expense

In the Audit expense reports for duplicate expense, Expenses selects the expense report for audit if it includes any expense item identified as a duplicate based on these attributes: amount, date, currency, expense type, and merchant.

Note: Enable the Detection of Duplicate Expenses feature to use this audit rule."

We are trying to test this and created an expense report with duplicates. but the expense report got selected for audit wasn't for duplicate reason.

Does this work at all?

Has anyone experienced this feature?

Thanks