This article is from the Canada immigration FAQ, by N. Cenk Gokce, Ankara, TR (dv535@freenet.carleton.ca) with numerous contributions by others.
If immigrants are out of Canada for more than six months in any 12-month
period, they will require a Returning Resident Permit to re-enter Canada.
While such permits can be applied for either in Canada or overseas, they
can only be applied for after the individual has been landed. A Returning
Resident Permit is useful in that it shows the immigrant has not abondoned
Canada as his/her place of residence. For absences shorter than 6 months,
there is no need for an RRP.
 
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