What will be sent to my IRL mailbox?

I am currently in the process of moving and don't have a IRL mailbox. Only Gmail. Will there be something sent to me?
And because of the moving I don't know what address should I write in the "Order Details".

So what will be sent to my IRL mailbox?

 

Nothing will be sent.

 

Okay then

 

Do not really got what you're asking.. can you explain furthy?

 

Will I get something (a bill or anything) in my mailbox after I purchase the game?

 

Ah yes, you get the link for the alpha, and a Key for your game.

 

no you won't.
you will probably get an email from paypal telling that you've bought the game.

 

I'm pretty sure that the IRL address is just your billing address, something associated with your credit card so fastspring knows it's your card. Everything is done via E-Mail.