Q. 1. Can a Catholic confess his sin(s) to a priest by telephone?
A. 1. In accordance with the teachings of the Catholic Church, you cannot confess your sin(s) by telephone. For the Sacrament of Confession to be valid, it is necessary that you confess your sin(s) to a priest in person. The following Catholic references support this teaching:
"Individual, integral confession and absolution remain the only ordinary way for the faithful to reconcile themselves with God and the Church, unless physical or moral impossibility excuses from this kind of confession." [OP 31] There are profound reasons for this. Christ is at work in each of the sacraments. He personally addresses every sinner: "My son, your sins are forgiven." [Mk 2:5] He is the physician tending each one of the sick who need him to cure them. [Cf. Mk 2:17] He raises them up and reintegrates them into fraternal communion. Personal confession is thus the form most expressive of reconciliation with God and with the Church. (Catechism of the Catholic Church # 1484)
"Individual and integral confession of grave sins followed by absolution remains the only ordinary means of reconciliation with God and with the Church." (Catechism of the Catholic Church # 1497)
"Individual and integral confession and absolution constitute the sole ordinary means by which a member of the faithful who is conscious of grave sin is reconciled with God and with the Church. ..." (Canon Law # 960)