Vigilance search uses the Levenshtein Distance metric in its search algorithm.  This allows for fuzzy searches, which provides for a more thorough search.  Misspelled names or typos can be found that would otherwise be missed entirely.

We also search for all nick-names.  When we encounter a name that has nick-names or a nick-name itself, we automatically search for all variations.

When we encounter a hyphenated name, we automatically search for the hyphenated name and each part of the hyphenated name independently.

You cannot find a more comprehensive exclusion database search service!