Following our last visit to your building, we noticed the installation of a French flag in your garden.
We thank you for your patriotism but given that the sporting activities of the summer are now over, we would appreciate it if you would remove it, in order to avoid any excesses.
In expectation of your cooperation and comprehension,
Sir, Madam, we ask you to accept the assurance of our distinguished consideration.Source
Just to be clear, this is in France.