If an airline or immigration policy requires an onward ticket, is it allowed or sufficient for airline and immigration policies to purchase it at the last minute or after being refused check-in/entry?
E.g., if the airline's check-in front desk refuses a traveler because of lack of onward tickets, can the traveler buy an onward ticket on their phone and be right after accepted by the airline's check-in front desk?
I have crossposted the question at:
