In this podcast is discussed how difficult it can be to underwrite for foreign investors; however if you have income being deposited monthly, as long as you can provide the financial documentation to trace the money that may help the situation.  

And of course document the current condition with plenty of photos and inspection results (toilets function, drains function, etc.)

On Performers, FCI has a low priced fee to collect, send all required tax and other documents to homeowner, and you avoid any Dodd/Frank, TILA, FDCPA, etc. issues.

It's not a formal document, just a simple paper that spells it out and gives them comfort you won't be taking them to court later. 

Your use of the word "flip" implies that you are purchasing the properties primarily for resale and as such they are not eligible for 1031 exchanges.There is no statutory holding period or statutory laundry list for how you document your intent.  

The legal documents will chage state to state but the concept is what you need to explain.

They may ask for additional documentation.

Unofficial Notice Document of Foreclosure3.

There, you can find many different documents that you can download and even use, depending on the type of document and where you live.

Especially in a tenant eviction situation for  a service call make sure bring another person for a witness and also document everything with pictures, forms, etc.If it goes to court you need to have an iron clad case to bury the tenant in front of the judge with a credible witness, documents, pictures, etc.No legal advice given.