The cost of renting to the wrong person can be enormous for a landlord. First, there is the missing rent when a renter does not pay at all. Or if a renter constantly pays late, then there is the cost of following up with the renter and collecting late fees. Going to court to evict a renter is not cheap either. And once the renter is out, you have to clean up the property and make it ready to lease again – hopefully the renter has not trashed the place! So here are a few red flags that the rental application you have could be a future headache.