YOu ought to get your information about the Catholic Church from someone who actually knows the truth and is not unwilling to say it. According to the Catholic Church, excommunication, in the sense of a formal proceeding, is not a penalty, but rather a formal proclamation of a pre-existing condition in a more or less prominent member of the Catholic Church. When such a person commits acts that in themselves separate him from the communion of the faithful, particularly when by word, deed, or example he or she "spreads division and confusion among the Faithful", it is necessary for the Church to clarify the situation by means of a formal announcement, which informs the laity that this is not a person to follow, and notifies the clergy that the person, by their own willful acts, has separated from the Church and is no longer to receive the sacraments, with the exception of Reconciliation if they turn from their ways. The decree may also indicate the mode of Reconciliation required for re-entry into the Church, specifying whether the local bishop may administer the process or it is reserved to the Pope. Excommunication is never a merely "vindictive penalty" (designed solely to punish), but is always used as a "medicinal penalty" intended to pressure the person into changing their behavior or statements, repent and return to full communion.
Excommunicated persons are barred from participating in the liturgy in a ministerial capacity (for instance, as a reader if a lay person, or as a deacon or priest if a clergyman) and from receiving the Eucharist or the other Sacraments, but are normally not barred from attending these (for instance, an excommunicated person may not receive Communion, but would not be barred from attending Mass). Certain other rights and privileges are revoked, such as holding ecclesiastical office.
Excommunication can be either ferendae sententiae (declared as the sentence of an ecclesiastical court) or, far more commonly, latae sententiae (automatic, incurred at the moment the offensive act takes place). The excommunicant is still considered Christian and a Catholic as the character imparted by baptism is indelible. Their communion with the Church, however, is considered gravely impaired.
In the Catholic Church, formal excommunication is normally resolved by a statement of repentance, profession of the Creed (if the offense involved heresy), or a renewal of obedience (if that was a relevant part of the offending act) by the excommunicant; the declaration of the reconciliation itself, by a priest or bishop empowered to do this; and then the reception of the sacrament of Reconciliation. In many cases, this whole process takes place within the privacy of the confessional and during the same act of confession.
As usual, you’re replying to the wrong person.
So, if an Excommunicated Catholic - and I am pretty sure a "venial" sin is never grounds for it (I could be wrong) - is not in communion with the Church, cannot receive the sacraments, and dies before they are reconciled ARE THEY DAMNED?