I focus on describing the actual property itself.However there are some numbers in the ad that will screen out some applicants, such as "One year lease only, first, last, and security deposit due upon lease signing" and "application includes criminal/credit/eviction history screening and employment/income verification". 

Establish your screening criteria; income, criminal history, credit, etc. and stick to that.

I will rent to poor people who can handle the rent, don't have criminal baggage, and no eviction history.

And can't you find tenants who don't know criminals the cops are looking for? 

., then I would explain that from now on I only deal with the tenant on the lease.And nobody with a criminal record, no matter what. 

There are tons of online, effective ways to do complete tenant checks (criminal, credit, evictions) - same goes for paying rent online.

Example:"Applicants WILL be denied for any of the following reasons without exception:Past EvictionsAny Felonies or Criminal RecordCredit Score Below ____No Rental HistoryNo or Bad Landlord Referencesetc..."

Landlords in Canada do not have the same access to criminal records that US landlords do.

Yes @felipe neither of us think this company is doing anything criminal.  

I have yet to do the full background checks on criminal/eviction/credit but proposed tenant seems confident that there are no issues.