Do I need a PxPost account to use Fooman DPS Pro?

A PxPost account is required if you want to use the following extension features: 

• Tokenised billing 
• Process customer refund from the Magento backend

This can be a limited PxPost account - you can still use your PxPay account to accept payments, and use the limited PxPost account only to allow refunds and/or tokenised billing.