In John 19:30, we read that just before Jesus died on the cross, He said,"It is finished!" This is an accounting term, meaning that the debt had been paid in full. In Greek, the phrase is one word, tetelestai. In the ancient Greek world, when a debt was paid in full, the word tetelestai was written on the papyri texts that were used as receipts for taxes. This meant that the debt was totally paid. The moral Law demanded payment for sin, and justice was fully satisfied with payment through the blood shed by Jesus on the cross. Because of the cross, God could then "be just and the justifier of the one who has faith in Jesus" (Romans 3:26).
*Taken from "Conquer Your Fear, Share Your Faith" by Ray Comfort (and Kirk Cameron)
See: “It Is Finished!”: Jesus Does Not Need Your Help by Tony Miano