If you're a hobbyists who paid a $5 fee to register your drone, you may be in luck. After a recent court decision, the Federal Aviation Administration is issuing a refund.

The refund follows a May decision by the U.S. Court of Appeals for the District of Columbia Circuit regarding the small unmanned aircraft system (UAS) registration program.

The FAA says the court's decision invalidated the registration requirement as it applies to certain model aircraft that meet the definitional and operational requirements provided in section 336 of the FAA Modernization and Reform Act (PDF). That broadly applies to hobbyists. The FAA says that owners of model aircraft operated in compliance with section 336 are not required to register.

Owners of all other small unmanned aircraft, including newly-purchased unmanned aircraft not operated exclusively in compliance with section 336, remain subject to the registration requirement. The FAA says it continues to encourage voluntary registration for all owners of small unmanned aircraft.

The FAA says it is working on a final rule with respect to registration and marking that will implement the court's decision.

In the meantime, if you want to delete your registration and receive a refund, fill out a self-certification form and mail it to the FAA.