[Biggirl]

I thought that there is a part of RCIA that includes intruction for those who have been baptized in other Christian churches and who desire to be recieved into the Roman Catholic Church.

[annalex]

there is a part of RCIA that includes intruction for those who have been baptized in other Christian churches

Indeed. I went through one. There is a catechumenate track and the candidate track in the RCIA. The candidates receive the post-baptismal sacraments as needed; catechumens start with baptism.