Make sure that you have the names and phone numbers of your potential tenant's last two landlords. And make sure you talk with who ever that is. Some people have a marginal credit report but pay their rent on time and take care of the property. If they have not rented recently because they owned their last domicile, ask for the name of the real estate broker who sold the house for them. Then, from the listing broker, get the name of the actual selling broker. Talk with both or all of them.