How do I decline these people? HUGE lies on the application.

[Joey Hansell]

Had 3 people stop by my rental house to view it: a father and 2 teen sons. They said that was all the people who were going to move in. Received their applications today, same story.

I called their current landlord and he tells me the father is actually living there with 6 kids, ranging in age from teens to mid 20s. Plus the landlord said he discovered they were hiding a dog (golden retriever) there exactly 1 week ago, but suspects the dog has been there for years. Landlord suspects they are now finding a new place to live because he said "no dogs".

So these people are obviously going to **** me over by secretly moving in 4 additional people plus try to hide a dog at my rental house. But the applicant swears over and over and over that the other 4 kids + dog are moving to live with their aunt, out of state.

How can I legally deny these people without just saying "my instincts tell me you are bull****ing me"

Thanks for the help. This is my first rental property and I didn't expect this situation.