I've heard and read mixed responses on this matter. Essentially, I am wondering if the companion ticket is still valid if I downgraded my AMEX Platinum Delta card to the one with no annual fee prior to completing the flight. I spoke with 2 AMEX credit card representatives, who gave me differing responses.

One told me that it would not be able to be used if I don't COMPLETE my travel by the date of downgrade.

Another one told me that it would be valid as long as I book my travel prior to downgrading my card, but that the travel could occur after I downgrade my card and the certificate would still be valid for that travel.

Then I read some posts on here suggesting that you can make a booking with the companion ticket, AFTER you cancel/downgrade your card.

Is there a definitive answer or consensus on this?

Also, would I be able to give the companion ticket to someone else? Like could I give it to my parents and have them use it without me being on the booking?