My sister who has POA for my mum is trying to apply for probate for my dad's will in which mum was named as executor so we need a PA14 form signed to go with the application. Mum is in a care home with Alzheimer's. I assumed it would be straight forward to ask her GP to complete the form but they have point blank refused and I don't really know where to go from here. Has anyone else encountered this or have any advice?