According to Catholic teaching, a baptized person who has been married and divorced is not free to re-marry until any previous marriage has been annulled. In most cases, this also applies to any previous marriage of a non-Catholic who has been baptized in a Christian denomination.
Individuals who have divorced but not remarried may enter the RCIA or RCRA process and celebrate initiation in the Catholic Church. They must have their previous marriage annulled before entering a second marriage.
Individuals who have divorced and remarried may enter the RCIA or RCRA process, but must have their previous marriage annulled and their second marriage validated before they celebrate initiation in the Catholic Church.
An "Annulment" (which is technically called a Declaration of Invalidity) is a statement by a church tribunal which declares a particular marriage null or void. An annulment does not mean a couple was not married; it means that the marriage did not meet the Church's criteria for a full, permanent sacramental marriage because one or both partners were unable or unwilling to fulfill the requirements for a sacramental marriage.
Individuals who are living in a marriage not recognized by the Catholic Church (such as a marriage before a civil authority) may enter the RCIA or RCRA process but must have their marriage blessed by the Church before they celebrate initiation or reception.
You should clarify your marital status with the pastoral staff before you begin participation in either the RCIA or the RCRA.
• More Information About Annulments.