The process for a Paper Tribunal that you do not need to attend is no different from that for a an Oral Hearing that you do attend although there are some time constraints that you need to be aware of.
Ou PIP MR and Appeal guide (in the PIP area) explains the process, once you have looked at this, if you still have questions then come back to the forum.
Gordon
Nothing on this board constitutes legal advice - always consult a professional about specific problems
