Point of contact -- USA to Canada and back

[cango]

When driving to canada by car from USA, is it:
that the first point of contact is Canadian Immigration Office, that checks for our Canada immigrant visa and lets us into canada for further PR formalities.

When driving back to USA from canada by car:
This is the only time when we encounter USA immigration officer that they check for our USA visas.

 

[GK]

Yes.