Q:

Requirements to have PayPal Reference Transactions enabled

For a new project we are looking for a payment system that allows to use a single user authorization for charging their credit card multiple times over a long period of time.  PayPal's Reference Transactions seem a great fit, however before we plunge into implementation a few things should be clarified.  One of them is: 
What exactly is required from a Merchant to have Reference Transactions  enabled?  
We do not want to complete the integration to find out that we do not meet the requirements, as suggested here.  We are waiting for response from PayPal MTS but... well... it has been already a week...

A:

Paypal MTS team has no permission to enable Reference transaction.  Plz contact Paypal customer service to enable it. Customer service contact Phone is here.