You reminded me of when my father developed Alzheimers and Mum phoned the utility companies to get all the accounts put in her name.  One of them (electricity or gas maybe) refused to do anything as Mum 'wasn't the account holder'.  Mum eplained the issue but they wouldn't budge.  Finally in desperation she put Dad on the phone.

Dad was an amiable man still, but by this stage his answer was to always hand the phone back to Mum.  Anyway the company person pressed on with explaining how the account needed his OK to be changed....until the penny finally dropped and she realised Dad hadn't a clue what she was talking about, and in fact was no longer listening. 

Dad politely suggested he put Mum back on the phone.  Mum took the phone, the account was changed....and from the utility company employee no more was said.  LOL