Final answer:
The petitioner or their attorney can fill out and serve the Motion to Set Aside Forfeiture.
Step-by-step explanation:
According to the information provided, the person who is allowed to fill out and serve the Motion to Set Aside Forfeiture is the petitioner or the individual whose property has been seized. The petitioner can act as their own counsel or hire an attorney to file the motion on their behalf. The motion is typically filed in the court where the forfeiture case is being heard.