Being registered for the RFS program does not mean that a party must receive RINs with the renewable fuel they purchase. Being registered for the RFS program means that a party is eligible under the regulations to receive RINs.
The regulations do not require registered purchasers of renewable fuel to purchase such fuel either with or without RINs attached. On the other hand, a party that has not registered for the RFS program is prohibited from taking ownership of renewable fuel with attached RINs.
This Question and Answer was originally posted at: Questions and Answers on the Renewable Fuel Standard Program (PDF) (59 pp, 228 K, EPA420-F-08-006, April 2008, About PDF)