A divorced person is generally not required to seek an annulment unless he plans to attempt marriage again. And unless a person has been excommunicated (divorce is not cause for excommunication), a Catholic always has access to confession. In fact, a divorced Catholic should go to confession as soon as possible if the divorce was an occasion of mortal sin. If the divorce was not an occasion of mortal sin, then confession is not necessary. Either way, the Catholic would be able to lead a normal sacramental life.