You may be able to get some information from the applicant's case worker about their past too.  

Once you complete their application process, they will determine you don't fall under their top tier borrower qualifications and propose terms that are far less favorable.

Right now, the renters do not fill out any sort of application, they move in as soon as they look at the unit and move out on a moments notice.

If you use an application designed for landlords you'll get some critical features that you won't find in a general accounting platform like Quickbooks or Excel. 

Screening applicants!

During the winter like Oct-March, I always get applications from low credit scores.

Is your DSCR ratio greater than 1-meaning are you cash flowing (according to the lender's criteria of mortgage, property taxes and insurance (and HOA) if applicable).

Choose a screening company that includes ID verification to confirm applicants' identities, with some now incorporating facial recognition technology for added security.

Charge application fee.

For example, I mention that every adult must pay a $30 application fee, pass my credit/criminal background, make a combined income of 3x the rent, and whether or not the property accepts pets.