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Open your scans in PDF Reader Free: PDF Viewer for Android to fill out, review. If they do get changed appropriately, you can always parse for them in your application. Access scanned PDF files that you have captured with the free PDF Editor app. Most of the document won't be human readable but these timestamps should be. Choose Save as and PDF as file format, and your file is ready. The other way you can visualize it is to simply open the PDF in Notepad and search for the properties. By following these instructions you have removed all your personal information in your document. There may also be APIs that can be used to programmatically retrieve this metadata. The Creation field and Modified field should have different timestamps. One is when you open the document in Acrobat and hit Ctrl-D to view Document Properties. Therefore, it shouldn’t take more than a few seconds for you to load and save the file Click the image above to download your free sample PDF. If the editor your users use does change ModDate or xmp:ModifyDate, then you should be able to see it in two places. If you would like to add PDF properties to the file (Subject, Title, Author, etc.), click Additional Properties, add the required. We have handily compressed the file to ensure that it’s as small as possible. However not all tools adhere to this quite a few simply leave all metadata untouched, so this method of checking isn't 100% reliable unless you know what PDF editor your users employ. Strictly speaking, modifying the PDF should change its ModDate or xmp:ModifyDate without changing its CreationDate. One is when you open the document in Acrobat and hit Ctrl-D to view Document Properties. Are the users modifying the PDF using Acrobat? If so then what Danio mentioned above should work.