If I purchase an UA award ticket using card A with tax $100. Later, I change it and pay the tax difference $50 with card B.
if I cannot make the trip and ask for the tax refund $150, how would it be distributed? $150 to card A (original payment), card B (add collection) or $100 to A and $50 to B?
I found a
similar thread, but it was 10+ years ago for revenue tickets and all were speculations. Are there any recent first hand experiences?