During pre-check, the PAO verifies that the sub-vouchers attached to the e-claim have not been previously used for another payment. The PFMS system's DMS and tracking mechanisms help identify any duplicate submissions.
Source: CAM Para 2.3.7
How does the PAO detect duplicate sub-vouchers?
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This answer is for informational purposes only and does not constitute legal advice. Always refer to the original rules and consult competent authorities for official interpretation.