i am bringing a “little old lady” (newbie traveler) to US for her first visit. I am trying to make this as easy as possible for her.

I have a potential award travel in C on AC going from US via YYR to Germany on her return trip. She only would be connecting 4 hours at airport. She is German citizen.

Am I reading correctly she will need a transit eTA transit visa for C$7? It looks like if I get her passport info from her, I can apply for and pay for this for her....correct.

Any other advice? Any pitfalls I’m not seeing?