If you receive a departure order, you have 30 days after it becomes enforceable to leave Canada properly. If you don't leave within that time, the departure order automatically converts into a deportation order, which carries much more serious consequences for future entry.
(1)224 (1) For the purposes of subsection 52(1) of the Act, an enforced departure order is a circumstance in which the foreign national is exempt from the requirement to obtain an authorization in order to return to Canada.
(2)(2) A foreign national who is issued a departure order must meet the requirements set out in paragraphs 240(1)(a) to (c) within 30 days after the order becomes enforceable, failing which the departure order becomes a deportation order.
(3)(3) If the foreign national is detained within the 30-day period or the removal order against them is stayed, the 30-day period is suspended until the foreign national’s release or the removal order becomes enforceable.