Even regular tickets it says you have to produce an I'd and the credit card used to buy them but they when was the last time they made you produce the info when they are linked
There are only 3 ways to buy them
1 in person I'm sure they wll ask for your membership card there
2 by calling member services there you give your membership info
3 through the
dvc website where you log in
All three they verify your membership before purchasing