., in case of criminal misconduct, fraud, or similar situations.

Also checking their criminal background is also a vital step.

In the ad it's self I would just simply say that "we do an in-depth criminal and reference check (must have good references!)."

Any person who fails to allow this grace period may be criminally prosecuted as a disorderly person. (45) So if you have a 5 day grace period on your lease you're doing so out of the kindness of your heart.  

Decide on minimum income, length of time in job, minimum credit score, prior LL references, criminal background criteria (read Seattle laws), etc.  

Walkway is confined by side fence and the complex itself.3) If there is a criminal element inside your gates, the gates will be ineffective.

I would strongly sudgest calling the sheriffs department and ask about the criminal activity near the house you buy.

Then the prospect should pay an application fee for criminal record and credit).

Either way, I would only bother to do a background check to check for criminal history because I already have a good paying tenant in place in the unit. 

@Tony Castronovo, even if you consider him the primary, you'd still want to charge an app fee for the other two to at least run a criminal background check on them.