That is going to be a State by State thing. But you will not find a Prepay penalty on an FHA or VA loan and typically you will not find them on Conforming loans (Fannie/Freddie stuff)

If this prepayment penalty is written into the contract, no way can you get out of it. Usually, though, the prepayment penalties last about 3 years. At the end of the 3 years, the prepayment penalty will be gone. Also, some companies will forgive the prepayment penalty, if you get your new mortgage through them if you are selling your current house and buying another house. Prepayment penalties are usually for paying off the loan, or paying big amounts back on the loan. Your contact will specify what the prepayment is for.

An increase in prepayment will decreases cashflow

The state of Pennsylvania requires that any prepayment penalty be stated in the contract. When the prepayment penalty is stated in the contract it becomes legal.

It is a liability and refundable to the customer if the merchant fails to deliver the good or service on time.