Would you be more likely to pay tax if HMRC popped a personal Post-it Note reminder in your mail?

Here’s a wheeze: the taxman is trying to get stubborn payers to cough up what they owe by sticking a handwritten note proposing a chat (and including a phone number to call) on his letters. It looks like a clever – if unusual – folksy touch to try to encourage tardy citizens to pay their dues. But there’s something...