I am English and my husband is Greek and we live in Ireland. My son age 7 was born in Belgium and has a British passport. My husband is going to baptize him in Athens, Greece over Easter so he will be Greek Orthodox, but I want to baptize him in England so he is church of England like myself. Is this possible? Do I need to declare in England that he has already been baptized in Greece or can I just baptize him a second time with my daughter aged 5 who has never been baptized. My husband & I were married in England and lived in Belgium and now Ireland. He has British citizen ship as well as being Greek.
Many thanks

Both churches recognise the baptism of the other, there is no need.

Baptism does not make them member ( really) in one or the other, it will be in how they are raised. I would say that if the Anglican Priest knows he is already baptised he would not do it again as there is no need.

Baptism is a symbol of one's having voluntarily died to one's former way of life and being reborn into a dedicated way of life in doing God's will. All biblical baptisms involved conscious repentance and willful acceptance of the ransom sacrifice. In short, it is an expression of faith performed by a believer. Since a newborn can't choose one way or the other, baptism for such is really unscriptural. That applies also to a child who might not be able to fully understand what the baptism means. Belief is essential for the baptism to have true scripural meaning in relation to the one being baptized.

Mark 16:16
He that believeth and is baptized shall be saved; but he that believeth not shall be damned.

Baptism is the first act of obedience of a believer, after they are saved. It is more than a mere ritual. It is a picture of a person vicariously participating in the death, burial, and resurrection of Jesus, where their old life has passed away and all things have become new. If a person is not "saved," and gets baptized, it is a false testimony to the world that the person has trusted in Jesus Christ alone for their eternal life. Baptism is the outward expression of an inward impression. Explain the Gospel message to your children and, immediately after they have accepted Jesus as their personal Savior and Lord, get them baptized. Philip and the Ethiopian in Acts 8:34-38 is a perfect example.