Your story reminds me of one of my many border experiences. Growing up in my family meant going to the US often because my parents emigrated here from there in the early 60’s, so all our extended family was south of the border.
One day myself (maybe 14), and my two younger sisters Rebecca (12) and Gloria (9) were put on a bus in NB to go to NH. Two hours later the bus driver (or border guard?) put us OFF the bus when we tried to pass across the US/Canada border. Why? Well … for three reasons.
Problem #1: We didn’t look like siblings! Four of the six kids in my family were adopted, so I was Caucasian, Rebecca was Pakistani and Gloria was African-Canadian. But we were sisters. Yeah. Right.
Problem #2 arose when the guard asked us where we were from.
I said Toronto (we had moved from there to NB fairly recently). Rebecca said Sussex (this was the closest town to our farm) and Gloria said Apohaqui (closest settlement to our farm).
Problem #3. We none of us had been provided with so much as a hint of documentation. It was a kinder, gentler world back then!
Result. With relatively little fuss we were taken off the bus and told to phone our parents to come pick us up. We were not getting to New Hampshire that day.