where do I find such a form, once check is cashed release me of all liabilty and future law suits permatnetly.
not lawsuit but another term that means the same as
Chapter 11 Bankruptcy Attorney
There's not a "form" around for this, and it would be foolish to draft it yourself.
You should have a lawyer draft it to the particular circumstances--at least if you want it to be worth more than the paper it's printed on.
Personal Injury Lawyer
Don't be cheap. Hire a lawyer to do this for you, because it may come back to bite you later on.
Child Custody Lawyer
I agree with the other responses: though you will be able to find various "release of liability" forms online, your better option would be to spend a couple of hundred bucks and get some legal advice. Attorneys get paid for a reason. And you'll pay more if you get stuck witn an insufficient document.