Now the bad roofer is calling me threating me, and saying he is going to place a lean on the house and he only wants $400 to finish out the contract.

Chicago's threats are the City government and their influence on the state government.

Hello, Is 7 day notice, where you send a notice to the tenant to let them know if they do not pay the eviction process; More like a threat.

@Jennifer Fox - you've received some great advice here, so I'll just highlight the best ones:- Do not let them intimidate you with threats of lawsuits. 

"Dark pools’ creaky infrastructure and slow computer systems are more of a threat to investors than the ultrafast traders that lately have fueled anxieties about the private trading venues, according to new research.The technological shortcomings can cost mutual funds and hedge funds millions of dollars over time, New York research firm Tabb Group plans to say in a release Wednesday.Tabb’s study is one of the most detailed examinations yet of trading activity inside private trading venues run by banks and consortia that operate away from exchanges and allow investors to trade with greater anonymity, at a lower cost and sometimes in bigger blocks.The use of these venues is under increasing scrutiny as regulators negotiate settlements with Barclays, Credit Suisse Group AG and other large banks over improprieties in how they operated their dark pools, according to people familiar with the matter."

In a hot market and a hot property 48 hour expirations/threats almost always backfire.

You can not force a tenant to honor a term lease.Do as suggested and try to negotiate a termination settlement and if that goes badly threated court action.

I have completed a one year course in university and will be moving onto a 4 year course next year in Cyber Security.

Move on with life, don't let her threats bother you. 

WIthholding information until the last possible second, making last-minute demands with threats of "do this or we'll cancel the contract" and they were under the gun since they were transferring across country.