Advertising a rental property

[Marc Belisle]

Hello fellow landlords. I would like to know how you make it known when advertising or screening tenants that the applicants must make three times the rent in monthly income. From reading over this site I have noticed this seems to be a general rule of thumb in order to weed out applicants who probably don't make enough to safely afford the rent. 

We just started renting our second home a year ago, and the first time we used a property management company -- this time we intend to try on our own. Also what is the BEST way to verify income? 

Thank you