Quebec has unusual laws with regards to contests (Quebec's legal system is unique in many ways from the rest of Canada's due to its French past)
http://business.financialpost.com/2011/09/08/why-many-contes...
"the province’s Lotteries Act ... require you to post security for contests open to Quebec residents where you do not have a place of business in Quebec, the value of any single prize exceeds $5,000 or the total prize value exceeds $20,000."