Records needed for this question
File hashes, invoice numbers and carrier revision markers.
How to investigate
Test an identical file, a re-rendered copy and a corrected invoice as three separate cases.
An illustrative review decision
A renamed file should not become new spend merely because its filename differs. Conversely, matching a filename must not suppress a corrected invoice whose contents and financial treatment have changed.
What can lead to the wrong conclusion?
Blocking every repeated invoice number may reject a legitimate corrected document.
The result to retain
A duplicate-versus-revision decision matrix.
Apply the review in context
Review carrier invoice evidence, inventory, findings and recovery cases in AuditRes Telecom.
This guide describes a human review method, not a claim that every scenario is automatically detected or executed. Explore AuditRes Telecom.