PIP Mandatory Recon – Is a basic letter enough?

Dear Forum, I Have read your guides but wanted to be completely clear on one point. Is it correct that to ask for a Mandatory Recon on PIP one only has to make the request (by phone and backed up by letter)? And that one does not – at this MR stage - have to give detailed reasons why each point score was wrong?

Citizen’s Advice spent two hours going through my sister’s decision letter, making notes on why many point scores should be disputed and promised to send us these. However the notes have not arrived and we cannot get through on the phone. Her deadline for asking for Mandatory Recon is the 6th. I am thinking that we can just ask for MR by phone and simple letter and send detailed notes on each question later during the next step of an appeal – is that right? Sorry to be asking this basic question, we have been confused by Citizen’s Advice. We do not yet have the F2F assessor’s medical report. Many Thanks