The package looks at all hyphenation breaks in the document, comparing them against a white-list prepared by the author. If a hyphenation break is found, for which there is no entry in the white-list, the package flags the line where the break starts.

The author may then either add the hyphenation to the white-list, or adjust the document to avoid the break.

The author is Patrick Gundlach. The package is Copyright © 2012 Patrick Gundlach.