Based on her postings on social media and online advertisement sites, not only did I find out her full name and e-mail address, I found out where she currently lives, approximately how much she pays for rent, how many children she has and their ages, that she is a single mom, that she has a side business, that she is looking to “meet adventurous people” etc.

But i want receipts and other proof of income.

This is something I find important because many normal institutions around my area don't do commercial loans unless you have a golden credit score and can show proof of liquid funds to repay the loan back ten times over.I also hope this helps new RE investors keep their heads up when everything seems to be throwing you to the ground.

So you have proof it was indeed abandoned.You should store her items in a garage or a storage facility.

Do you have proof that this rent has been actually paid?

Make sure that they are required to hire a licensed remediation company and that they provide you with a copy of the contract for the work and proof that it has been completed.

BP Nation,When I read posts on local REIA or Meetup boards I see whole sellers requesting proof of funds.

., both halves of the medicare and social security taxes.)

I have a little experience helping out a realtor as an assistant for open houses, and social media pages. 

I know it's atypical and extreme but here in NYC, plans are only accepted if prepared by licensed architects,  and permits are only issued to licensed contractors after proof of insurance and worker's comp compliance.