The proposal was described in briefing books prepared for Foreign Affairs Minister John Baird and Trade Minister Ed Fast, and cited by the daily Globe and Mail.
"Recent (international) crises have highlighted that many Canadian passport holders have limited connection to Canada (and) are seen by some as maintaining a 'citizenship of convenience,'" the document was quoted as saying.
The document also reportedly notes that consular officials had been asked to help Canadian citizens in 50 international crises in 36 countries in one recent 15-month period alone.
As well, it says the government could impose a "residency requirement or a tax contribution obligation as a condition to be eligible for assistance abroad."
Also Read
Adria Minsky, spokeswoman for consular affairs Minister Lynne Yelich, dismissed the brief, telling AFP: "Our policy is to provide consular services to all Canadian citizens, to the best of our ability."
Concerns about dual citizenship flared up in 2006 when the government was called to rescue Canadian citizens living abroad and with few ties to this country from Lebanon.
The thinktank Asia Pacific Foundation of Canada estimated in a 2010 report that there are 2.8 million Canadians, or roughly eight percent of the total population, living abroad.