As a carer you may need to apply or assist your cared for to claim this allowance. Unless you already have power of attorney it is easier if the cared for can sign the form themselves . It is also easier if you have a recent copy of a medical assessment . Otherwise the authorities will contact the cared for’s GP or Consultant for evidence . This may take longer but the allowance will be backdated.
This allowance is for people who are pension age .
https://www.gov.uk/attendance-allowance