paying a negotiated amount

i recently had a bankruptcy dismissed because i could not pay the trustee the monthly amount ( 100% of my debt was the amount i had to pay while in bankruptcy protection ) the first creditor has called and offered a reduction of 40 percent..i want to pay, but do not know what to ask for in my part of the negotiation, as proof of the debt being settled, and what to have the credit card company put in writing so that they cannot sell the remaining part of my debt sold to someone else

Get the settlement offer in writing from them. They will more than likely give you a time frame to pay it or the agreement is off. Get that in writing as well. Then figure a budget that will allow you to pay within those time perimeters and go after it. There is a good FREE ebook at takecontrolbedebtfree-dot-com that gives a 7 step plan and covers how to budget and plan out your finances. This may help you out as well.