Here is the reply I got....blah blah blah......
This is in response to your email requesting information on the signatures of Senior Deputy Tiff Macklem.
All bank notes issued by the Bank of Canada bear the signatures of the Governor and Senior Deputy Governor who are in office at the time the notes are printed. So when the people in these positions change, so do the signatures.
However, new notes are not necessarily printed as soon as a new Governor or Deputy Governor is appointed. The Bank has to first deplete its stock of existing notes before it prints new ones. Therefore, it may take some time before bank notes with new signatures are put in circulation, depending on demand and existing stock.
Governor's signature
Every note printed after February 1, 2008 features the signature of Mr. Mark Carney. A change in signature involves the engraving of new plates. The Bank coordinates this engraving with the production process for the printing of new bank notes.
Deputy Governor's signature
Every note printed after July 1, 2010 will feature the signature of Mr. Tiff Macklem. A change in signature involves the engraving of new plates. The Bank coordinates this engraving with the production process for the printing of new bank notes.
I hope this information is helpful and thank you for your interest in Canadian currency.
Regards,
Carol Ann Levett
Client Service Representative
Bank Note Communication Team
Bank of Canada
1-888-513-8212