It's a background check of sorts. 

Neither tenant had a contract of any sort.

Some of us just sort of wing it and ok with cash flowing in random ways without a plan.

Does the notice have to be notarized or certified or can I simply email a DocuSign or sorts? 

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.

Hey Chandra, applying part of the rent toward the purchase price motivates buyers by helping them build equity.

@Clare Cui my questioning starts with a couple easy short answer questions (a sort of "yes" set").

For example this place claims to be able to rent for $6,000, and with 25% down that would be a $4200 payment, so $1800 cash flow (not yet factoring any sort of maintenance and whatnot of course, so just the mortgage/rent diff):https://www.redfin.com/SC/Columbia/1921-Pickens-St-29201/hom...Or to a lesser extent this place at $400 cash flow:https://www.redfin.com/SC/Columbia/1035-Kinard-Ct-29201/home...

Well they wont know it and to save money by not having a lawyer advise them .. boom they take title to all sorts of nasty crap.

Beware of trusting people with a profit motive.