[kidd]

The Catholic Church doesn’t accept other churches’ sacraments with perhaps the exception of marriage.

You have it backwards. The Catholic Church recognizes most protestant baptisms, and in an emergency, last rites administered by a protestant. The Catholic Church doesn't recognize protestant marriages.

[trad_anglican]

The Catholic Church doesn't recognize protestant marriages.

Nope. The Catholic Church often recognizes protestant marriages as valid.

[Ransomed]

I thought it was two Protestants married outside the Church don’t have to have another marriage if they join the Catholic Church, as long as the marriage is valid (no remarriage before). Two Catholics married outside the Church(a jp wedding or went to another church) or a Catholic and Protestant married outside the Church have to have another ceremony, I think. Two nonChristians joining the Catholic Church I think have to have a ceremony, but the Church considers them married.

I could be wrong with all or some of that.

Freegards

[Campion]

The Catholic Church doesn't recognize protestant marriages.

Untrue. Strictly speaking, we "recognize" all marriages, as long as both parties are actually capable of marrying. (We don't recognize divorce, so divorced-and-remarried folks fail the "capable of marrying" test.). A marriage between two Hindus is "recognized" by the Church, but it's a "natural marriage", not a sacramental one.

A marriage between two validly-baptized Christians is recognized as a sacrament. Since most Protestants are validly baptized, most Protestant marriages (again, where both parties are capable of marrying according to the church) are recognized as sacramental, just as the marriage of two Catholics would be.

What you may be thinking of is the Church law which does not recognize a marriage contracted by a Catholic in a non-Catholic ceremony without church permission.