Exposure
The crushing blows (there were two of them) came quickly. The first was the publication of Malone's volume of over four hundred pages on 31 March 1796. Exposing the forgeries in detail, he showed one by one that each document was flawed in its handwriting, its language, its orthography, and its history. The spelling of the documents was not only not that of Shakespeare's time, it was that of no time whatsoever. Numerous historical inaccuracies—not least of which was the reference to the Globe before that playhouse had been built—exposed the forger's ignorance. The handwriting of the Queen and Southampton did not at all resemble authentic examples. Words appearing in the forgeries (upset, for example) were not used in Shakespeare's time, or were used in a different sense than that of the papers.
Read more about this topic: Ireland Shakespeare Forgeries