Mayo Source information

I am a retired Mayo employee, and recently ordered tickets online through a Mayo source for a concert in December. Do I need to print out tickets to show that I bought them? If so, what site would I go to? Is there a phone number to call, to get more information on this? The tickets were bought through "Source", and the post card did not list a number for questions. I called HR at Mayo for more information on "source" and HR was no help. I
would appreciate any information from someone. Thank you!