Hi Helen,
Welcome to the forum, you might want to have a look at the following FAQ which explain where everything is
Welcome to Benefits and Work We have heard of this quite a bit with ESA but this is the first report I remember relating to PIP.
Is this a new claim or reassessment?
Either way, you might find the advice here helpful (although it relates specifically to ESA, the advice is basically the same for PIP)
Invited to a face to face assessment but no ESA50 sent Our PIP guide explains the PIP process, what to expect at the assessment and the assessment criteria.
PIP help for claimants May I suggest that you bookmark/favourite this on your web browser now so that you can find it easily in future? This will allow you to return with further questions or comments about your PIP without having to start a new topic each time. We ask members to keep everything relating to the same claim in one topic as it helps us enormously - and I hope you will find it useful too