How do the two free lounge passes for the Amex Velocity Platinum work?

How do the two free lounge passes for the Amex Velocity Platinum work? Do you have to hand the Amex card to the people at the desk of the lounge or should you receive two free lounge passes when you receive your card?

It is surprisingly simple. When you apply for your Amex Velocity Platinum you supply your Velocity membership number and once you get your card they add 2 single entry lounge passes to your veolcity account. You can check it online. In the lounge simply just turn up with your velocity card or borading card having your velocity number on it. The lounge staff is able to check your account online to see if you have available lounge pass(es) and you will be allowed in.

Great. Thanks for your help. I am afraid they wont last long on the account :D