[ealgeone]

If baptism is what saves a Roman Catholic, and mortal sin causes one to lose their salvation....why doesn’t the Roman Catholic have to be re-baptized again in order to regain salvation?

[Petrosius]

If baptism is what saves a Roman Catholic, and mortal sin causes one to lose their salvation....why doesn’t the Roman Catholic have to be re-baptized again in order to regain salvation?

From the Catechism of the Catholic Church

1272 Incorporated into Christ by Baptism, the person baptized is configured to Christ. Baptism seals the Christian with the indelible spiritual mark (character) of his belonging to Christ. No sin can erase this mark, even if sin prevents Baptism from bearing the fruits of salvation. Given once for all, Baptism cannot be repeated.

For sin committed after Baptism our Lord instituted the sacrament of Penance (see John 20:33).

[ebb tide]

If baptism is what saves a Roman Catholic, and mortal sin causes one to lose their salvation....why doesn’t the Roman Catholic have to be re-baptized again in order to regain salvation?

Because Catholics have available the Sacrament of Penance.

The Catholic Church has never approved repeated baptisms.

[MHGinTN]

If you EVER get a answer to that one, please ping me to it!