NAC - Preparation for Service for the Departed

Divine services for the departed take place three times a year, on the first Sunday of March, July, and November respectively. With this in mind, New Apostolic Christians also pray that souls who have died in an unredeemed state may find salvation in Christ.
God's will to redeem encompasses all human beings. Jesus Christ is Lord over both the dead and the living (Romans 14: 9).
Already in the congregation of Corinth, the living were baptised on behalf of the dead (1 Corinthians 15: 29).
This practice is continued in divine services for the departed conducted by the Chief Apostle and the District Apostles: in them, two ministers receive Holy Baptism with water, Holy Sealing, and Holy Communion on behalf of the dead. The sacraments are performed in the same manner as usual. In the other congregations, the departed are commemorated in a special prayer after the celebration of Holy Communion.
Divine services for the departed have an important place in the New Apostolic calendar. On the preceding Sunday, the congregations prepare themselves for this in a special divine service. Compassion and sympathy are to move their hearts to intercede for those who have died in an unredeemed state.

[@arnoldgreybe5520]

Just wonderfully done .

[@kneokneo5792]

Departed Service is not Biblical.
Firstly,
1 Peter 3: it is referring to the Imprisoned Spirits that were named “sons of God” (fallen Angelic beings)
in Genesis 6:” And it came to pass, when men began to multiply on the face of the earth, and daughters were born unto them,That the sons of God saw the daughters of men that they were fair; and they took them wives of all which they chose. And the Lord said, My spirit shall not always strive with man, for that he also is flesh: yet his days shall be an hundred and twenty years.
There were giants in the earth in those days; and also after that, when the sons of God came in unto the daughters of men, and they bare children to them, the same became mighty men which were of old, men of renown.
This verse is verified in 2 Peter 2:4
For if God did not spare angels when they sinned, but cast them into hell and committed them to chains of gloomy darkness to be kept until the judgment; if he did not spare the ancient world, but preserved Noah, a herald of righteousness, with seven others, when he brought a flood upon the world of the ungodly;
Secondly,
the NAC catechism that justifies the Departed service with evidence from Maccabees in the Apocrypha is Unbiblical// Apocryphal meaning:// (of the story or statement) of doubtful authenticity, although widely spread as being true.
The book of Maccabees was left out of the Bible for a reason. Maccabees is also not included in the Tanakh in Judaism.
Thirdly, 1 Corinthians 15, here does not apply as justification -
as your interpretation of this verse is incorrect.
See: “Now if there is no resurrection, what will THOSE do who are baptized for the dead? If the dead are not raised at all, why are people baptized for them? 30 And AS FOR US, why do we endanger ourselves every hour?
Apostle Paul here is addressing the early Corinthian Church, and uses this example of pagans practice (THOSE), to say even the Pagan’s believe that man shall be resurrected. He makes the distinction when he says, “And AS FOR US,” Paul is simply illustrating that without resurrection our Christian faith is futile.