My question involves criminal law for the state of: California
"As you can see, extortion by threatening letter is pretty much the same as extortion by force or fear, except for two key differences:
Extortion by threatening letter must involve putting the threat into a letter or other writing, and
For extortion by threatening letter, the alleged "victim" does not actually need to hand over their money or property or commit an official act...or even consent to do so."
<http://www.shouselaw.com/extortion.html>
"Hello ***, This is *** from Serenity Salon, I noticed you blocked my numbers, which I was not expecting you do this, I am sending the evidence of your presence at Serenity and your due balance, if you dont pay your balance I will take a legal action against you, what you did is as a shop lifting, even worse since trick, lie and fraud returning your deal to Yelp after using it. This will stay on your record so be careful what your decision will be." - SALON OWNER

