Can the PDF authenticity checker detect all types of modifications?

Our PDF modification detection system can identify most common types of PDF alterations including:

• Metadata changes (creation dates, modification dates, creator/producer information)
• Structural modifications (xref table changes, incremental updates, object-level changes)
• Post-creation content modifications (page additions, object insertions, structural edits)
• Digital signature tampering

However, extremely sophisticated manipulation techniques using specialized PDF editing tools may sometimes evade detection. The system works best with standard PDF creation workflows and common editing software.

Some limitations include: PDFs created with unusual or custom tools may show false positives, password-protected PDFs cannot be analyzed, and PDFs with corrupted metadata may produce inconclusive results. For comprehensive PDF verification, we recommend using our service alongside other document integrity checks, especially for critical legal or financial documents.