In 1959, a Dr. J.R. Groulx signed a letter of guarantee
promising to pay Banque Nationale for all present and future loans
made to his son-in-law, Maurice Robitaille.
The guarantee contained a clause that it would be binding on the
estate and heirs until cancelled.
After Dr. Groulx died in 1963, Robitaille continued to borrow
from the bank and a few years later, the bank sued Dr. Groulx’s
widow and two daughters for repayment of money which had been
borrowed after Dr. Groulx’s death.
However, the succession had not been informed of the existence
of this guarantee, as the Bank had the only copy in its
Donald Seal, QC, BCL’54, later assisted by
Leonard Seidman, BCL’72, took on the case on
behalf of Dr. Groulx’s widow, Florence Soucisse, and argued the
case all the way to the Supreme Court of Canada, in National Bank
v. Soucisse et al.,  2 S.C.R. 339.
In this interview with Focus online, Me Seal shares his
thoughts about this precedent-setting case.