I had a friend purchase a domestic flight ticket for me because of the Amex 50/200 offer. When I attempted to check in, I was notified by phone agents that I would need to present a copy of the purchaser’s ID and credit card. They could not provide any additional information. I went to the airport as instructed w the requested copies of cc and license, only to be told by the agents that the purchaser must be physically present at the same airport with the original credit card. I asked whether the purchaser could instead go to the airport where they reside, but after calling their internal support line, the agents confirmed the answer was no. I also sought a supervisor and this person claimed she was one. The agents also stated that this situation was “against the terms of service.”
Frontier allowed the ticket to be purchased weeks in advance, yet only flagged the reservation right before check-in—leaving me no time to fix the issue. As a result, I am forced to purchase a same-day ticket for the exact same flight at more than double the original price. When I asked the airport agents for written documentation of the policy or the reason for the denial, they refused to provide anything.

This was purchased w AMEX Platinum. Any chance they'd would provide any protection for the reimbursement of the new /replacement tickets?