§1. The contracted marriage is to be noted also in the baptismal registers in which the baptism of the spouses has been recorded.
§2. If a spouse did not contract marriage in the parish in which the person was baptized, the pastor of the place of the celebration is to send notice of the marriage which has been entered into as soon as possible to the pastor of the place of the conferral of baptism.
Source: Code of Canon Law (Vatican.va)