ok, so i did flagpoling/ landing at coutts border. the usa immigration just asks for general questions, and when you tell them you are for flag pole for canadian pr, they will ask you to park your car in the parking area and go inside the office ( the officer there has your passports)
1. he will issue you a simple letter saying that you were denied entry to usa. you name/dob and country of passport will be mentioned there ( please check that A4 paper. as they are lazy AF. mine and my spouse's dob were incorrect we went in twice to get the letter corrected- all he did was cancelled the printed dob and re-wrote with a pen..
2. he will show a way to return to Canada sign board, so you have to take a u-turn for Canadian side border.
3. you will be asked to park your car again near the office and you will go inside - Towards ( Traveler counter). they will ask you questions
a. where you currently work and your position
b. they asked me when me and my spouse got married, where we got married and how long did we know each other before we got married ( to assess the relationship part - pretty general )
then they will ask you to sit down and wait for them to call out your name and hand over the passport and the second copy of signed COPR .
Voila .... you are a permanent resident !!!!!