Normally this occurs when a Permanent Resident (PR) submits a request to renew their Permanent Residency card and CIC sees that the applicant appears to not have complied with their residency requirements. 

They will not renew the PR Card and send it to a local office for an investigation. They ask the applicant to answer several questions and this is the best time to hire Roy Kellogg to assist. There are valid reasons that even if the applicant had been not been in Canada for 570 days in a five year period the CIC Officer may except that explanations along with Humanitarian and Compassionate factors.

 If the Officer believes there are no grounds to overlook the applicant’s absences from Canada you will be sent to an admissibility hearing then an Appeal Hearing.

 The best time and most effective time is to deal with the residency issue at the investigation stage because when one has experience it should be used to explain away all the extenuating circumstances of the absences.