Oh. Well I think it would be good not to assume someone has not made confession as needed. That doesn’t seem very Christian.
Since no one has actually answerd your question and it was my post Heres what the Q&A
from the Baltimore Cat tells us
Question 255:
Does he who receives Communion in mortal sin receive the body and blood of Christ?
Answer:
He who receives Communion in mortal sin receives the body and blood of Christ, but does not receive His grace, and he commits a great sacrilege.
Question 256:
Is it enough to be free from mortal sin to receive Plentifully the graces of Holy Communion? A.To receive plentifully the graces of Holy Communion it is not enough to be free from mortal sin, but we should be free from all affection to venial sin, and should make acts of faith, hope, and love.
St. Paul’s epistle to the Corinthians, in part 14 it notes: "And on the Lord’s day, gather together and break bread and give thanks, first confessing your sins so that your sacrifice might be pure.
Acts 20:11 “When Paul had gone up and had broken bread and eaten…” St. Paul explained clearly what “breaking bread” meant. 1 Cor 10:16 “The cup of blessing which we bless, is it not a participation in the Blood of Christ? The bread which we break, is it not a participation in the Body of Christ?” St. Paul continued, 1 Cor 11:27 “Whoever, therefore, eats the bread or drinks the cup of the Lord in an unworthy manner will be guilty of profaning the Body and Blood of the Lord.” St. Paul in these words confirmed Catholic teaching that the “bread … of the Lord” is truly Christ’s Body, Blood, Soul and Divinity, and that the “cup of the Lord” is the same substance: “Whoever … eats the bread or drinks the cup … will be guilty of profaning the Body and Blood of the Lord.”
EWTN
A serious, grave or mortal sin is the knowing and willful violation of God’s law in a serious matter, for example, idolatry, adultery, murder, slander. These are all things gravely contrary to the love we owe God and, because of Him, our neighbor. As Jesus taught, when condemning even looking at a woman lustfully, sin can be both interior (choices of the will alone) or exterior (choices of the will carried into action). A man who willfully desires to fornicate, steal, murder or some other grave sin, has already seriously offended God by choosing interiorly what God has prohibited.
Mortal sin is called mortal because it is the “spiritual” death of the soul (separation from God). If we are in the state of grace it loses this supernatural life for us. If we die without repenting we will lose Him for eternity. However, by turning our hearts back to Him and receiving the Sacrament of Penance we are restored to His friendship. Catholics are not allowed to receive Communion if they have unconfessed mortal sins.