Honestly, you should have just stopped at Facebook.There’s nothing quite like receiving an unsolicited online message, random proof of funds, complicated background story, sketchy work locations, and a foreign accent to scream scam any more loudly.

I would use a software management software that people could pay online or setup auto pay.

You can't really use zillow and the online ones...

Also in some states there are free online databases.  

In that case, we encourage you to learn more about Ryan Poske and Bildwise from other available sources, including word of mouth, other online reviews, and Indiana’s public court records.

We look the employer up online and use the website number.

When they look online and ask for info it sends them to a buyers agent.

Apparently I can file the court papers online now but I have to select a commercial efile service.

Back then I used an online service to filter my target areas.

Personally if I don't have rental history within 3 years for a potential tenant and they say they own a property - I verify the address and name on title with the county that the property is located in (most states this info is online through the county assessor's website)