title: How to implement a test phase in Paypal Recurring Payments?
body: <p>I have a question to recurring payments in paypal: I have express checkout payments integrated into my project. After I complete a payment, I will initialize the recurring payments. As long as I give the correct amount (e.g. 2.99 Euro) to express checkout payment, everything works fine. Now I would like to integrate a test phase, in which a user don't pay for the first month but for month 2, 3 and so on. Unfortunately I cannot do an express checkout payment and pass the value of EUR 0, then the error "invalid amount" appears.</p>
  
  <p>How do you implement such a test phase with Paypal? I have seen Spotify does it like that.  There I don't pay anything for the first month, but in the second month I payed 9.99 euros (without doing anything, they take my payment details when I register for Spotify). Does anyone know how this works?</p>