.-- If you do not follow the terms of the “Notice to Pay Rent or Quit” we may then begin eviction proceedings against you and you will be charged with the crime of “Unlawful Detainer” if a judge upholds our claim.The amount of rent now due, as of today’s date _________________, is as follows:Current Month Late Fee_______________Current Month Rent_______________TOTAL DUE_______________Time is of the essence.If you have not already posted your rent via the mail, please call us immediately to make arrangements for us to collect the rent in person.Thank you for your prompt attention to this matter!

You will likely need to pursue the unlawful detainer action.  

Familial status/age(a) It is unlawful to advertise a preference, limitation or discrimination against families with children in the household or against persons 40 years of age or older.

It's called an Unlawful Detainer action and you'll have to file one if she doesn't voluntarily move. 

If they have unlawful detainers / evictions on their records, I won't rent to them period.  

It's possible it wouldn't show up on every eviction reporting service, if the state it happened in doesn't have their public records easily available, I suppose.The eviction report services buy and sell databases with public records of unlawful detainers/evictions.  

And even then, it's a big risk for the tenant, because in the meantime, you can start eviction (which puts an unlawful detainer action on their eviction record) for nonpayment of rent.  

If the tenant does not move out within 5 calendar days after notice, the tenant is "unlawfully detaining" the premises.

Most poster's here at BP are of the belief that it is universerally unlawful and/or enethical to collect rents on a property that you do not own. 

This means that you must have the correct language in your 60/90 day notice and you must fill out the unlawful detainer complaint correctly.