A recommendation for best sites to screen tenants (background, criminal, credit, etc)Any information would be greatly appreciated.

However, landlords may terminate a month-to-month tenancy with a 20-day notice if the tenant has violated the terms of the rental agreement, committed a nuisance, or engaged in certain criminal activities.Under the state's "just cause" eviction law, which applies to tenancies in Seattle and some other cities, landlords may only terminate a tenancy for specific reasons, such as nonpayment of rent, violation of the lease agreement, or a landlord's desire to sell or occupy the property.

Just be sure to get one that gives a credit, criminal, eviction check. 

Hopefully if they are as dumb as the average criminal they will be caught.

It would be great if the people that are taking advantage of COVID get criminal charges filed against them, hefty fines, something.

Some of which are out right criminal in what they do.

Here is our recommended checklist for tenant criteria:Makes enough income to afford your rent.Stable employment or a co-signor with sufficient income.History of paying rent on time.Friendly and easy to work with.Clean criminal record.Fits your lifestyle requirements.Smoking.Pets.

Why any of these guys are listened to with anything but disdain is beyond my comprehension.Respectfully,Gary   In America (left wing narrative), there's always self-generated issue that's almost always 'man made', such as these "global warming", or "animal cruelty so lets not eat animal product" or "same toilet for every gender" while they are ignoring the very first problem that people facing like "rising criminality" and "rising violence in highschool".

Will they provide criminal background checks of their principals? 

One of which is Transunion's Smartmove, which offers credit/background/criminal type checks.