Distinguish Duplicate and Revised Supplier Invoices

Practical answer: Compare identifiers, lines and source files before deciding whether a repeated invoice is a copy or correction.

A supplier may resend an unchanged PDF, issue a corrected invoice with the same number or replace it with a credit and new invoice. Automatic deletion based on one matching field can remove important revision evidence.

Compare the complete identity of both documents

Review supplier, invoice number, issue date, amount, tax, currency, line items and file content. Record whether each version came from email, upload or a forwarded message.

Classify the relationship before changing status

Exact copies can share one accepted record. Revised documents should remain traceable, with the accepted version and reason for change visible. Credit notes are separate financial sources, not duplicates.

• Never use amount alone as proof.
• Do not overwrite earlier evidence.
• Record the reviewer’s decision and accepted version.

Check downstream exports for the final outcome

Confirm only the accepted payable or credit records appear in the intended export while the revision history remains available for explanation.

Duplicate and revision decision

• Several identifiers and the source files were compared.
• Exact copies, revisions and credits are distinguished.
• The accepted version is explicit.
• Exports reflect the documented outcome.

Questions people ask in this situation

Can the earlier revision be deleted?

Retention depends on policy, but keeping revision evidence often makes the final decision easier to explain.

What if invoice number and total match but lines differ?

Treat it as a potential revision or error and investigate with the supplier rather than marking an automatic duplicate.

Where AI Expense fits

AI Expense exposes recognized identifiers and source documents for duplicate review. Human confirmation remains essential when supplier revisions are ambiguous.