Non-performance – within the meaning, given by the Contract Law, the non-performance represents a wrongful act by one of the parties which have concluded the agreement. Namely, this activity is against the set-up obligations. For example, one of the parties had to pay the purchase price for acquiring ownership of real estate, but the party didn’t do so. The act of non-payment of the agreed sum represents actual non-fulfillment of their obligation. Usually, the failure to perform leads to refund plus compensation for damages. It is different than the delayed performance, which represents actual performance. But more or less behind the agreed deadlines in the contract.