How to protect yourself against contractors when flipping...?

[Ben Valentin]

So I remember in the podcasts a few guests talking about learning the hard way when dealing with contractors. Losing money, dealing with mechanics liens, etc. They all mentioned that the more signed documents you collect before the project begins, the safer you are in the long run. 

Does anyone know where or how to find these types of documents to have on hand when picking my contractor? And exactly what documents I should have? Do I need to get an attorney, or is there a simple template I can print off the internet? 

Also, does anyone have experience with contractors giving you a hard time signing these - If that comes up, how should I handle the contractor? 

I'd like to have this all prepared before going into my first deal. 

Thanks!