Almost every Word document includes information such as hidden text, Object info, Personal Information, and other invisible info stored as metadata.
To remove this information, Word 2007 has a feature called Inspect Document which lets user inspect for these hidden elements and to remove them. To do so, open the document which you want to thoroughly inspect for hidden elements. Click the Office Button and go to Prepare and select Inspect Document.
This will bring up Document Inspector dialog, listing all options for inspecting: Comments, Revisions, Version, Document Properties, Personal Info, XML Data, Headers, Footers, Watermarks, Invisible Content, and Hidden Text, etc.
Enable desired options available in the list and click Inspect.
It will start inspecting for specified elements. Once inspection is completed , you can remove the inspected elements from the document by clicking Remove All with each option you’ve selected.
If you click on Remove All, it will instantly remove all the specified elements from the document.
Now your document is safe, and you can start preparing it for generic distribution.