Contract question on land that has mortgage higher than sell $$

[Aaron Rowzee]

Good afternoon, fellow BPers.

Very green investor here in an interesting situation with selling my own property. Short version of a long story: I was in Harvey, house flooded, we were insured, have people coming out of every nook and cranny trying to buy the 5 acres my home is on. Home is 0 value and I will not be repairing.

Fast forward to today: insurance adjuster letter arrived and they will be paying an amount larger than my mortgage pay off, but I have several people begging me to sign a contract. Here's my question: what wording (if any) needs to be in the contract for the buyer and myself to be protected assuming the insurance company renigs and doesn't pay their proposed amount? OR what needs to be in the contract that legally says "this deal is contingent on the insurance company paying the mortgage company off". Or does the basic contract wording already infer this with the job of the title company?