Thank you for your question.
Box 19 of the T5008 is Face Amount. Kindly only enter information which is printed on your T5008. If you believe an error has been made on your T5008, kindly contact the issuer of the slip.
This answer doesn't help because it doesn't explain what "Face Amount" is?
Good afternoon,
Box 19 – Face amount
If the security represents indebtedness (for example, bonds and other debt obligations), enter the nominal value, in dollars only, that appears on the face of the document (that is, the amount to be repaid at maturity). Leave this box blank if the security does not have a face amount (for example, shares or commodities).
http://www.cra-arc.gc.ca/tx/bsnss/tpcs/slps/fnncl/t5008/t5008slp/cmpltng/bxs/bx19-eng.html