Last November, I purchased on-line tickets from Sing Air by credit card.
In December, I closed the card account and opened another account with a different bank.
The closed account cards were destroyed.
Last month at check in at LAX, I was asked for my credit card.
My new card's numbers did not match the one used to purchase the tickets (No Shit!)
Although Sing Air confirmed they had been paid and had no problems with any thing else, they would not board me unless I produced the card from the closed account.
After about a hour, we called Visa and they verified to the Sing Air Station Manager the purchase.
It would not do.
We had to have the October account statement faxed to the airport and handed to the Manager.
The four other ticketed people traveling with us were not asked for their credit card.
Sing Air said, the computer randomly selects candidates!