The best part about this thread is you got a lot of heavy hitters to respond and share their thoughts! 

So that's why I give 45 day notice,, this gives them sufficient time to think and respond that they will be accepting the new terms so if they can give me proper notice back by 1 day before the 1st of the month if they are going to vacate, This should be in your renewal notice.At that time if you have any other terms that will change regarding utilities then you let them know that as of same date utilities will be their responsibility and give them the proper information to make the switch for utilities.  

Can I legally say no or not respond in Tennessee?

And thank you all for responding so quickly! 

They can take weeks to respond to your voicemail or email, and nothing you can do about it.

Shawn Ackerman Hi Shawn,Thanks for responding to my question.

I agree with @David Faulkner reply but thought I would respond to the ROI statement in OP.  

SEC. 33-1368(A), and see how they respond.

Sorry Mr Reed, for nor responding until now, I had over looked your response to my query re.

If so, the loan was probably 'real money' from their checkbook and they'll likely respond better to an offer to give them something more than a game show host's goodbye (a lovely parting gift).