PIP review form PIP.1043 does not ask person who fills in form to sign

Dear fellow members and moderators,

I have received my PIP REVIEW FORM, it does not say AR1 OR AR2 but it says PIP.1043.

This time contrary to 3 years ago ( I was given a 4 years award) my 17 years old teenager is typing my answers on separate sheets of paper due to diagnosed carpal tunnel syndrome, deformity of fingers, arthritis of hands, shoulders etc

I fill in the pip review form, and in each activity box I write briefly to see attached sheet titled with every single daily living and mobility activity.

If my memory does not fail me, I thought PIP forms would ask for the person filling in the form to write their name, relationship to pip claimant and to sign.

It does not ask for this in the PIP.1043 but I am filling it in even if very briefly to refer to attached typed sheets for further information.
Of course of top of each sheet we put my name, national insurance number and pip.1043.

I want PIP REVIEW assessors to know that this time, due to worsening and new conditions affecting my hands me getting shooting pain in hands, dropping things etc this time the printed evidence is filled in by my 17 years old child.

- As my child is not 18 can PIP still take into account that I did not type all these sheets, my 17 years old did?
- I assume it is good enough for me to mention on the form my child typed the further evidence sheets?
- can my 17 years old, who is not an adult yet, write a letter to testify that not only she helps me with typing evidence for my pip form, but also helps me at times by cooking the meals, helping me put my shoes on etc?
Ps: my child is not my carer but she helps me a lot when she can if she is here.
Or will her letter not be taken into account as she is not 18 yet.

I thank you very much for your help in this matter.

Kind regards