The letter I "sent" him said that his pet snakes were in violation of a city ordinance against exotic animals. He was informed that he had 24 hours to get rid of them. He was furious, and ready to fight.
One could do this stating they have:
A pet that needs to be removed .
There car has too many tickets and is about to be impounded.
A warrant for their arrest.
Are about to be Audited or owe back taxes.
That they've won something
Anything that they know they are in the right about, or feel strongly about, that will get their emotions going. Or that will make them very nervous.