12. By a notice served upon the debtor or his assigns, in the manner provided in subsection 2 of section 13, the Corporation shall require payment of the debt, in accordance with the terms of the contract, within a delay of thirty days.
Such notice may also be given by registered or certified letter mailed within the same delay to the last address known to the Corporation.
R. S. 1964, c. 111, s. 11; 1975, c. 83, s. 84.