Sincerely, ________ Owner/Manager"If the don't pay promptly, serve them the appropriate legal notices for your jurisdiction.

Your message prompted me to go back and re-read the rules for Sheriff's Sales in my county and I was wrong in my thinking that I had to pay the full amount upon sale. 

@Brandi Scharrer There's two sides to every story, and while some of the things you described aren't that big a deal and/or were fixed promptly, many of them are.  

Some things we have included that we have seen common include:Makes 3 times the amount of monthly rent paymentHas 3 or more good years of rental references Has no prior evictionsHas not made excessive late paymentsHave not filed bankruptcy or been foreclosed on in the last 5 yearsHas a good credit score (any one have any specific number they don't typically go below)Does not have any drug, violence, theft, fraud, capital or sex offender convectionsHas no breeches of leasesHas no history of damage to propertyMust be neat, clean, prompt and courteous Any one have any others they would add to the list?

A small issue like this should have be handled promptly . 

As a landlord/owner, I provide them with an above-average condition property and take care of any issues promptly.  

This topic has prompted me to go back and look at my own screening criteria documents to make sure they are crystal clear about this.

Otherwise, they're welcome to sue you and you'll let the judge decide what you should pay, which you will honor and promptly pay.Were you aware of any fee you should pay prior to the landlord asking you to pay it?  

Communication started out well initially but then regressed over the course of a year with said renter not replying to a text or a call promptly (think after two or three days maybe, even a week if that). 

Let her know asap what the new rent will be as this may prompt her to move in the fall instead of having him added.