DLA to PIP: Appointee question about DWP home visit

I started a similar thread about this recently but this query is about the DWP appointee home visit specifically. I hope this is OK.

My son is soon to turn 16 and I'm weighing up if I need to apply to become his appointee or not when he moves from DLA to PIP.

I understand that if I want to become his appointee, someone from the DWP will visit us. Can I ask what happens at the visit? I'm not sure my DS will engage with a stranger at all. He has autism and has difficulties communicating with people he doesn't know well.

If he goes to hide in his bedroom could they insist on going up to his room to speak to him there? I think he - and I - would find that incredibly intrusive.

How long does the interview last? What sort of questions do they ask? Will we need to show them birth certificate/passport etc? (So I can be prepared).

Also, as he's in his GCSE year, can I ask for the appointment to be outside of school hours?

Thank you.

Hi I did this last year, all the dwp rep did was for me to sign the forms in person saying I agree to be dwp appointee, he didnt ask to see anyone but me, took 5 minutes. My daughter is autistic and does not tolerate people aswell, just neded to show birth certificates for ID purposes and then we were done. It waa easy and done in minutes, nothing Intrusive as all the info is when you apply online. The house visit is to verify who you are in your home with proof of that.

Hope that helps.