The penalty for the late filing of a radiology release form may vary depending on the specific circumstances and the policies of the organization or institution handling the form. In general, late filing could result in delays in processing the requested radiology services or medical records. There may be additional administrative fees or potential rejections of the request if it is deemed untimely. It is best to consult the specific guidelines and policies of the relevant medical facility or institution to determine the exact penalty for late filing of a radiology release form.