No, I’m pretty sure that is incorrect. (Hopefully one of my fellow Catholics can provide a link/source.)
**
Hi PeterJ

Were you talking about me?
Abortion and Excommunication**
May 20, 2004
Any Catholic who obstinately denies that abortion is always gravely immoral, commits the sin of heresy and incurs an automatic sentence of excommunication.
Canon Law and Church Teaching
Canon 1398: “A person who procures a completed abortion incurs a latae sententiae excommunication.”
Canon 751: “Heresy is the obstinate denial or obstinate doubt after the reception of baptism of some truth which is to be believed by divine and Catholic faith; apostasy is the total repudiation of the Christian faith; schism is the refusal of submission to the Supreme Pontiff or of communion with the members of the Church subject to him.”
Canon 1364 §1: “an apostate from the faith, a heretic, or a schismatic incurs a latae sententiae excommunication.”
The phrase “latae sententiae” means a judgment or sentence which has already been brought, in other words, a sentence or judgment which does not need a future additional judgment from someone in authority; it refers to a type of excommunication which is automatic. Such a sentence of excommunication is incurred “by the very commission of the offense,” (CCC 2272) and does not require the future particular judgment of a case by competent authority.
Apostasy, heresy, and schism are all offences which incur a sentence of excommunication automatically. Heresy is the obstinate denial of any truth of the Catholic faith, on a matter of faith or morals, which has been definitively taught by the Magisterium. The Magisterium has repeatedly and definitively taught that abortion is always gravely immoral. (CCC 2270 to 2275)
Pope John Paul II, Evangelium Vitae, n. 57: “Therefore, by the authority which Christ conferred upon Peter and his Successors, and in communion with the Bishops of the Catholic Church, I confirm that the direct and voluntary killing of an innocent human being is always gravely immoral. This doctrine, based upon that unwritten law which man, in the light of reason, finds in his own heart (cf. Rom 2:14-15), is reaffirmed by Sacred Scripture, transmitted by the Tradition of the Church and taught by the ordinary and universal Magisterium.”
Obtaining an Abortion
Any Catholic who deliberately and knowingly obtains a procured abortion commits a mortal sin and is also automatically excommunicated, under canon 1398.
Under the laws of secular society, if one person commits a crime, then anyone who deliberately and knowingly provides essential or substantial means for that person to commit that crime is called an accessory to that crime and is also subject to the penalties of law. Similarly, any Catholic who deliberately and knowingly provides essential or substantial means for any woman to procure an abortion also commits a mortal sin and also incurs the same sentence of excommunication.
Any Catholic who substantially assists another in the deliberate sin of abortion is also guilty of serious sin and also incurs a latae sententiae excommunication.
Believing in Abortion
Any Catholic who obstinately denies that abortion is always gravely immoral commits the sin of heresy. The sin of heresy also incurs a latae sententiae excommunication.
Unfortunately, some Catholics obstinately deny that abortion is always immoral, and some Catholics claim that abortion can, at times, be a morally-acceptable choice, and some Catholics claim that a person can, in good conscience, choose abortion. Under the Code of Canon Law of the Roman Catholic Church, canons 751 and 1364, all such Catholics are automatically excommunicated for the sin of heresy.
This sentence of latae sententiae excommunication applies to any Catholic who denies that abortion is gravely immoral, regardless of whether they keep this denial hidden or publicly reveal it.
Promoting Abortion
Those Catholics who publicly announce their denial that abortion is always gravely immoral, or who publicly promote abortion, or who publicly argue in favor of legalized abortion, also commit a mortal sin and also incur a sentence of automatic excommunication.
This sentence of excommunication applies to Catholics who are politicians, as well as to those Catholics who are political commentators, or public speakers, or who write or otherwise publicly communicate their erroneous view that abortion can be morally-acceptable or that abortion should be legal. This sentence of excommunication also certainly applies to those Catholics who claim to be theologians or Biblical scholars, but who believe or teach that abortion is not always gravely immoral.
Those Catholics who promote abortion are automatically excommunicated for two reasons. First, they have fallen into the sin of heresy by believing that abortion is not always gravely immoral (canons 751 and 1364). Second, these Catholics are providing substantial assistance for women to obtain abortions by influencing public policy to make abortions legal, and to keep abortions legal, and to broaden access to abortion. Those who provide such substantial assistance commit a mortal sin and incur a sentence of automatic excommunication (canon 1398).
(Part One)