The following information I received from CIC office for landing procedure. It might be useful for whom received their passport back recently:
Validating a Confirmation of permanent residence at a border
Once you get your Confirmation of Permanent Residence (IMM 5292 or IMM 5688) from a Canadian visa office and, if necessary, a permanent resident visa in your passport, you must have these documents validated by an immigration officer at a local CIC office in Canada or a port of entry (POE).
If you decide to go to a POE, you must:
Leave and re-enter Canada,
this can be done by entering the U.S.* at a land border, by ferry or by flying out to any other country and back into Canada,
Inform the officer you need to validate your Confirmation of Permanent Residence,
Show the following documents:
passport, travel or identity document (including secure visa counterfoil IMM 1346, if applicable),
Confirmation of Permanent Residence and instructions issued by the Canadian visa office, and
proof of legal status in Canada, such as:
valid work permit, study permit, temporary resident permit or visitor record, or
proof of implied status, such as:
payment receipt,
copy or printout of paper or online extension application,
proof of mailing or online submission,
etc.
(if applicable) any temporary resident document in your possession, whether valid or not.
