Threatogram
A standard format letter sent to someone from a company (in the UK originally applied to a private parking company) demanding money and threatening all sort of legal action and dire consequences if not paid. The threats usually have no legal enforceability, and the letter is a scare tactics bluff.
"i got another threatogram for XYZ parking "
"Ignore them, they havent got a leg to stand on, and they cant take you to court, they have no evidence"
"Ignore them, they havent got a leg to stand on, and they cant take you to court, they have no evidence"