It is easy for people to download fake W2s, ESA paperwork, etc, with a few mouse clicks and a credit card. 

Whether bank or credit union - either will work. 

What documents do they require, what credit scores do they allow, how do they verify previous rental history, etc.?

Fico while they will look these are not credit score driven loans like those buying rental houses or houses to live in...

It simplifies the process since Zillow handles credit, income, and background checks for a small fee paid by the applicant.Background Check Services: If you prefer not to use Zillow, consider using services like MySmartMove or RentSpree.

In neighborhoods that won't attract high credit score tenants, I've found that a stable job history with a MINIMUM of 1 year at current or previous job to be the best indicator of a great tenant. 

The credit score is the single best indicator of how one pays their financial obligations.

Thats your bonafides to being able to do future deals.As mentioned above, keep your credit perfect.

What documents do they require, what credit scores do they allow, how do they verify previous rental history, etc.?

;however, my issue is that I dont have good credit and since im self employed I make.very little income.