I would have to examine the note in person to make a judgment call as to authentic vs. fabricated error, but I do want to correct your cataloging of the note. It should be BC-46a-E14-i. BC-37d is a 1954 series note. Yours is a 1973 multicoloured note.
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BWJM, F.O.N.A.
Life Member of CPMS, RCNA, ONA, ANA, IBNS, WCS.
President, IBNS Ontario Chapter.
Treasurer, Waterloo Coin Society.
Show Chair, Cambridge Coin Show.
Fellow of the Ontario Numismatic Association.