quote="1ke, post:4, topic:215997" Canon law makes provisions for lay people to baptize in cases of necessity/emergency.
Can. 861 §1. The ordinary minister of baptism is a bishop, a presbyter, or a deacon, without prejudice to the prescript of ⇒ can. 530, n. 1.
§2. When an ordinary minister is absent or impeded, a catechist or another person designated for this function by the local ordinary, or in a case of necessity any person with the right intention, confers baptism licitly. Pastors of souls, especially the pastor of a parish, are to be concerned that the Christian faithful are taught the correct way to baptize.
(b) Outside the case of danger of death, and without the permission of the parents, it was **wrong **for the grandmother to baptize her grandchild. She should confess this serious breach of canon law and parental rights.
Can. 868 §1. For an infant to be baptized licitly:
1/ the parents or at least one of them or the person who legitimately takes their place must consent;
2/ there must be a founded hope that the infant will be brought up in the Catholic religion; if such hope is altogether lacking, the baptism is to be delayed according to the prescripts of particular law after the parents have been advised about the reason.
§2. An infant of Catholic parents or even of non-Catholic parents is baptized licitly in danger of death even against the will of the parents.
(c) This must be reported to the parish immediately so that the sacramental records can be properly updated and an investigation conducted to ensure the validity of the baptism. If the child was validly baptized by the grandmother, they cannot be "re" baptized. However, the preist can complete the Rite of Baptism with the other parts of the Rite-- such as anointing with oil, lighting of the candle, reception of the white garment, etc.