I Originally sent ina copy of my AIr Baltic VIP , Alaska MVP Gold, and British Airways Gold card along with a copy of my passport. They then requested I send in a statement of my last 2 months flights. Then they requested physical scans of my BA gold card. When I informed them that I don't keep a physical copy of my BA gold card I was asked to request a new card from BA and then send it in. It felt like I was being given the runaround and I gave up.