Several Canadian judges have criticized immigration officials for citing Wikipedia articles in decisions to deport or deny entrance to foreigners. (Judges rap Wiki-evidence… Globe and Mail, Apr. 21) This is the most recent case of government agents using the online collaborative encyclopedia as an authoritative source.

In 2006 the USPTO ordered patent examiners not to use Wikipedia as a source of prior art information, but the number of patents that cite Wikipedia has continued to increase. (Many references are provided by applicants.) In the first four months of 2010, 348 issued patents contained references to wikipedia articles, a 27 percent increase over the same period last year.