Make sure you collect money for a credit check, because most credit checks aren't free. There are several apps you can use to do credit checks.Check if the income asked for on the application is monthly or annual. A landlord credit check helps determine if you're likely to pay rent. Applicants must have an acceptable income and credit history. Landlords do not have to accept your copy of the credit report, but you can explain what happened to your credit and what you are doing to clear up the problem.