Baptism permission

In Paul Turner's Blog by Paul Turner

Q: For a Baptism – If it is a Grandparent/Guardian of a child who is wanting the Baptism, do we need written permission from the parent or is their word enough. Thanks.

==

A: This is a canonical question, so a little outside my field. But my understanding is that yes, the word of the parent suffices. Still, it’d be a good idea to make a record of it; for example, the person who heard this writes it down with a date and a place – that sort of thing. Better if you can get two witnesses to submit testimony of what they heard.