It is an insurance policy by FSi.
If you should have an accident in the aeroplane you have trained in with FSi and die, FSi will pay your dependants various amounts depending on what level you hold.
It is a nice card to hold for this reason only, and it is a large incentive for those people with the choice where to train. For similar training costs one provider (FSi) will give you a life insurance policy as a 'reward'
I leave mine with my wife, and she knows that if the worst should happen she has money coming to her from that.
And for that reason I applaud FSi for sending them to us. (on my second Star as well!)