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Welcome to the forum, you might want to have a look at the following FAQ which explain where everything is
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My full name is showing, how can I stop it?
I've moved your post to it's own topic as there appear to be questions in it.
You say that you have submitted an MR request in regard your PIP claim, how did you do this?
Have the DWP acknowledged receipt of the request?
Was the request made within one month of the PIP Decision?
Gordon