> In a separate email, de Groot, the font designer himself, said that while in theory it would have been possible to create a document using Calibri in 2006, the font would have to be obtained from a beta operating system, "from the hands of computer nerds".

> "Why would anyone use a completely unknown font for an official document in 2006?" he went on to question.

> "If the person using Calibri was such a font lover that he or she had to use the new Calibri, then he or she should be able to prove that other documents were printed with Calibri in 2006, and these prints should be in the hands of other people as well," he wrote.

> De Groot said in his opinion the document signed by Maryam Nawaz was "produced much later, when Calibri was the default font in MS Word".

So apparently yes it would be possible but highly unlikely.