I recently purchased a ticket for my friend to fly from Argentina to the US. He will be flying with Delta. I am concerned that he will be asked to show my credit card at the check-in desk, but he does not have it.
I know Delta frequently asks to see credit cards, but I purchased the ticket via Expedia, so I don't think they will do so, seeing that they will not be charged if it were to be a fraud.
Does anyone have additional knowledge about this?