Is there a list of invalid baptisms?

I teach RCIA and am frequently asked which Protestant baptisms are invalid.

Which baptisms in addition to Mormon and Jehovah Witness baptisms are invalid?

Generally speaking, a baptism must use water and invoke the Trinity. If a faith community does not believe in the Trinity then their baptisms are invalid. If they baptize in the name of Jesus only, their baptism is invalid. If they don’t use water, their baptism is invalid.

Guide: Archdiocese of Baltimore’s Valid/Invalid Baptism List

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