Seal of the Living God

I have been given a Prayer “Seal of the Living God” which I like and say everyday. I am having second thoughts on two counts:

It is a Crusade Prayer 33 (is that a Catholic Prayer?)

It says that "This special prayer is a Gift from God the Father given to prophet Maria Divine Mercy for the protection of all God’s children. (I have not heard of Maria Divine Mercy before)

Do you know about this prayer. If so can you give me some guidance

Thank you
Kind regards

Whoever Maria Divine Mercy is she is not approved by the Catholic Church.

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