Go to their official website and there should be a contact button if there is click on it and ask them or if they have twitter/facebook you can ask that way too.

www.scottradecenter.com/arena-info/contact.html

this link wil bring you to their contact page, but i must warn you i dont think paul signs through the mail. its always worth a shot though :) good luck.

not sure if this the right section or not. However i was wanting to know if anybody knows that Scottrade Center forward to artists, thinking of sending an letter to sir paul mccarntey. If so do you think it is a good idea to ask for an index card signed?