If you NEVER disqualify an applicant, it sure is harder to get a complaint. Nobody, even “dirtbags” like rejection. Those folks who are thorough and document everything and cross their t's and dot their i's can still get slammed on discrimination complaints. Please understand, even if they've done nothing wrong, other than disqualify an applicant, the disgruntled applicant can cause havoc to the landlord with a formal discrimination complaint. It doesn't matter if it is valid or unfounded, it will still be treated with a full-blown, expensive, time-consuming, and very intense investigation. The investigation is conducted by some government agency and unfortunately, it seems they have an attitude of “You're Guilty until Proven Innocent.”
Don't get me wrong. I was a government employee, too, and as a cop, I witnessed many tax-eaters use the System to their benefit as well in the criminal court system.
Another good, solid, SAFE procedure to implement is how you process your applications. Do NOT get caught in the trap of reviewing all of the available applications in front of you and choosing the best one. This system could be considered illegal, because if you have more than three rental units, you must rent your unit to the first qualified applicant.
So, what is a qualified applicant? Now, we're right back to the basic challenge of having a “system” or a policy or a procedure. It's safer to have it in writing too, like right ...