I have visions of her stamping her feet and saying ‘but don’t you know who I am?’ as the Post Office staff look at each other and shrug their shoulders before turning back and saying to her ‘nah, sorry luv, haven’t a clue, but you still can’t drop that here!’She's obviously a royal mail business customer, so she should know that she wouldn't be able to take her post to the post office, they won't give a tit that your the label lady, they won't accept it. She would need to take it to a royal mail delivery/sorting office if her collection didn't happen.